Hello Kilburn,
I'm not sure if you have the following, which is James Calvert's "Australian Imperial Force Attestation Paper of Persons Enlisted for Service Abroad."
The attestation papers are 23 pages and were found at the National Archives of Australia link at: https://recordsearch.naa.gov.au/SearchNRetrieve/Interface/ViewImage.aspx?B=3191401
These documents, among other details, shows that 21 year old James joined the army on 15 March 1916, and that had been an "Engineer," who worked for a company in Belfast for 4 ½ years. The name of the company that employed him appears to be Wacker & Clark. The name of this company may actually be Workman & Clark, a Belfast shipbuilding company: See: https://en.wikipedia.org/wiki/Workman,_Clark_and_Company
James's unit when he first entered the service appears to be the 1st Aust Derm Hosp.
His attestation papers provide the address of his wife M.G. Calvert as Old Change, Alliance Avenue, Cliftonville Circus.
As you know, James and Mabel Gertrude Davidson were married in the Cliftonville Presbyterian Church, Belfast, on 30 January 1917. For quick access to the marriage record go to the www.irishgenealogy.ie link: https://www.irishgenealogy.ie/files/civil/marriage_returns/marriages_1917/09734/5531812.pdf
Also see James's Australian Imperial Force Certified Abstract of a Marriage Certificate at: https://tinyurl.com/2zty44p3
There is also a very interesting letter from James's mother Margaret Calvert to a Major J.H. Lean, Officer in Charge of Base Records, concerning the whereabouts of her son James. See: https://tinyurl.com/mum6pzms
In the letter Margaret gives her address as Old Change, Knutsford Drive, Cliftonville, Belfast.
The attestation documents also provide information about James being “absent without leave,” and "neglect to obey charges," and many other details, such as he was 5 feet, 4 and ¾ inches tall, weighed 133 pounds, with a chest measurement of 33-36 inches, that he had a “Sallow” complexion, grey eyes, brown hair, and was a member of the “ C of C,” which is the Church of Christ.
One document shows he returned (where he returned to is not mentioned) on board the ship "Themistocles," on 9/2/20, and that he was "Disc," that is "Discharged" on 10/4/20. See: https://tinyurl.com/2s3msea7
It is interesting to note that Themistocles was an Athenian Greek politician, general, and naval commander who lived from 524 to 459 BC. See the Wikipedia article about him at: https://en.wikipedia.org/wiki/Themistocles
For more information and photos of the HMAT A32 Themistocles, go to: https://www.birtwistlewiki.com.au/wiki/HMAT_A32_Themistocles
You can search Australia’s World War I Army service records at the following National Archives of Australia link:
https://www.naa.gov.au/explore-collection/defence-and-war-service-records/army-first-world-war-1914-18
I also found information about James in Australia's First World War Nominal Roll, and First World War Embarkation Roll, which you can search at: https://www.awm.gov.au/research/guide/ww1
Here is the Nominal Roll for James Murray Calvert, an Engineer of Argents Hill, Nambucca River, N.S.W. He is Regimental Number 1886: https://s3-ap-southeast-2.amazonaws.com/awm-media/collection/RCDIG1067645/large/5374415.JPG
For more information about Argents Hill, Nambucca, New South Wales, go to the australiasguide.com link at: https://australiasguide.com/nsw/location/argents-hill/
The following link will take you to a Google Map of Argents Hill, N.S.W., just west of the Nambucca River: https://tinyurl.com/3da3u62w
This link shows you that James's date of enlistment was 15/03/1916, and that he returned to Australia on 22/12/1919: https://www.awm.gov.au/collection/P10831340
The following Australian War Memorial link will take you to the Advanced Search page for Military Personnel: https://www.awm.gov.au/advanced-search/people
You had mentioned in your post to Ireland Reaching Out that James Calvert was born on 2 November 1893. I don’t know if you have a copy of his original birth record, but I found his birth record at the aforementioned www.irishgenealogy.ie website, which shows that he was born in an address of 101 Old Park Road, Belfast, and that the occupation of his father, William Henry Calvert, was Draper. His mother Maggie’s maiden name is McKay.
James’s birth record is number 16 in the birth register, which you can access at: https://www.irishgenealogy.ie/files/civil/birth_returns/births_1893/02285/1857744.pdf
Here is a Google Map of Old Park Road in Belfast: https://tinyurl.com/spyfs8b3
The following link takes you to a Google Street View of Old Park Road: https://tinyurl.com/4cxz4khm
The 19 August 1919 birth record for your dad, William Henry Calvert, shows he was born at an address of 14 Henderson Avenue, Belfast. This Google Map shows that Henderson Avenue, indicated by the red teardrop icon, is 1.8 miles north of Oldpark Road, Knutsford Drive, and the Clintonville Road: https://tinyurl.com/2mpac4j5
This Google Street View shows row housing along the Henderson Road: https://tinyurl.com/mr3r4bdj
With further research at the irishenealogy.ie website I uncovered the marriage record for James's parents, William Henry Calvert and Maggie McKay, showing they were married in the Belfast Presbyterian Church on 19 August 1891.
William had been a bachelor and Maggie a spinster. The residence of both is just recorded as "Belfast." William's occupation was "Draper." No occupation is recorded for Maggie.
William's father is William Calvert, a "Farmer." Maggie's father is William McKay, an “Auctioneer.”
William and Maggie were married by license in the Presbyterian Church by Samuel McComb. One of the witnesses to the marriage was William Henry McKay, who may have been Maggie's brother. The first and middle name of the second witness is Margaret Scott. I couldn't clearly make out her last name because of the handwriting, but it may be Henchie.
You can access a copy of the original marriage record for William and Maggie at: https://www.irishgenealogy.ie/files/civil/marriage_returns/marriages_1891/10672/5889523.pd
At the Public Record of Northern Ireland website (PRONI) I uncovered a listing for W.H. Calvert in the 1895 Belfast Directory, showing he was a “draper” of 1 Cliftonville Street in Belfast: https://tinyurl.com/bdpj94fx
The listing for W.H. Calvert is on page 490, second column, 14th person down from the top of the page, which you can enlarge.
You can search the Belfast directories from 1819 to 1900 at the PRONI link: https://www.nidirect.gov.uk/services/search-street-directories
MABEL GERTRUDE DAVIDSON
At the irishgenealogy.ie website I found the birth record for Mabel Gertrude Davidson, who was born on 5 May 1895. Her place of birth was 35 Lothair Ave., in Belfast. Her father Samuel is a "Teacher." Her mother Maggie's maiden name is Macgowan. Maggie reported Mabel's birth to the registrar.
Mabel's birth record is number 90 in the birth register: https://www.irishgenealogy.ie/files/civil/birth_returns/births_1895/02219/1837389.pdf
A Google Map shows that Lothair Avenue, indicated by the red teardrop icon, is just east of Oldpark Road, Knutsford Drive, and the Cliftonville Road in Belfast: https://tinyurl.com/2s4a4a7j
The following link takes you to Loathair Avenue viewed from Atlantic Avenue in Belfast: https://tinyurl.com/588ht2ch
This second Google Street View shows Lothair Avenue viewed from Ocean Avenue: https://tinyurl.com/2uw96t29
Mabel's parents, Samuel Davidson and Maggie Macgowan were married in the Ormeau Road Methodist Church, Belfast, on 12 July 1882. At the time of marriage Samuel was of "full" age, meaning 21 years old or older. Maggie was a "minor," under 21.
Samuel's occupation was "Teacher." His residence at the time of marriage was Dunadry. His father is John Davidson, a "Tailor."
No occupation is recorded for Maggie. Her residence at the time of marriage was Eblana Street, Belfast. Her father is Alexander Macgowan, employed as a "Clerk."
The clergyman who married Samuel and Maggie by license was Samuel Hollingsworth. The name of one of the witnesses to the marriage is James E. Davidson. The first name of the second witness is Mary, but I'm not sure of her last name because of the handwriting. You can access the marriage record at the irishgenealogy.ie link at: https://www.irishgenealogy.ie/files/civil/marriage_returns/marriages_1882/10972/8011145.pdf
This Google Map shows that the townland of Dunadry, northwest of Belfast, is 15.8 miles from Eblana Street in Belfast: https://tinyurl.com/2vjcs8te
Here is a Google Street View of the Antrim Road (A6) in Dunadry: https://tinyurl.com/s2c5sm48
This is a Google Street View of Eblana Street looking south from Cromwell Street, Belfast: https://tinyurl.com/3ur2bz64
Kilburn, if you decide to visit Belfast in the future, you may want to submit a Meet and Greet form to Ireland Reaching Out, to see if a local volunteer familiar with Belfast is available to guide you through the Henderson Avenue, Oldpark Road, Knutsford Drive, Cliftonville Road, Lothair Avenue, and Eblana Street sections of the city.
This service is free. For more information and an application form, go to: https://irelandxo.com/meet-and-greet
Kind Regards,
Dave Boylan
SOURCES
National Archives of Australia
irishgenealogy.ie
Wikipedia
birtwistlewiki.com.au/
Google Maps
Google Street Views
Public Record Office of Northern Ireland (PRONI)
Ireland Reaching Out Meet and Greet
