A great starting point, in cases such as this, is to run a search of your information through www.johngrenham.com
It is quite a rare surname in the Republic of Ireland, especially when spelled Boushell. (There are 6 phonebook listings for "Boushel" but only one with the double-L.)
"Bushell" is the most common spelling (of which you will only find 12 listed in the Eircom Phonebook today!) along with Boshell, which was very much Dublin-based (and Catholic).
If you are hung up on the 'Boushell' spelling variant, the only returns in 1901 are Co. Kildare and Co Tipperary ... both Catholic.
Your best bet is to keep an open mind about the spelling (which was not standardised until the 20th century anyway) and to take a look at the 1901 Census for leads.
Here you will find the location of 12 Bushell familes (a mix of Protestant / Catholic) and 10 Boshell families (all Catholic).
THEN...
Run a wildcard search for any spelling variant "B*s*el*" + "Methodist"... this leads you to... (drum roll) ...
Bousele in Co. Down (birthplace Fermanagh) ...
Bussell in Drumbad [AGHAVEA] Co. Fermanagh (where the given name "Henry" has been handed down) ... that's it!
With that in mind, I'd also keep an eye out for any occurrence of "Henry" of an alternative Protestant persuasion ...
Bussell in Toolin [AGHAVEA] Co. Fermanagh "Irish Church"
Bushell in Deerpark, Fermanagh "Church of Ireland".
I'd definitely be considering the civil parish of AGHAVEA (in the vicinity of Constitution Hill) and the townlands of Drumbad and Toolinn as starting points, if I were you.
There you will find likely ancestors in Griffith's Valuation (all tenants of the Earl of Erne) sharing entire townlands between them...
John Bushell of Drumbad (AGHAVEA)
Francis Bushell of Drumbad (AGHAVEA)
And next door "Irish Church"...
Henry Bushell of Toolin (AGHAVEA)
Thomas Bushell of Toolin (AGHAVEA)
Others living in the vicinity of Constitution Hill include:
James Bushell (farmer) & Mary Jane Armstrong of Aghnacloy North (registering births from 1878-1883). Son of John Bushell (25 acres in Griffiths Valuation).
John, Henry & Alice Bushell (farmers) of Aghnacloy North (unmarried siblings in 1901)
William Bushell (shoemaker) & Mary Reid of Aghnagrane (registering births from 1867-1881) – Church of Ireland 1901. Son of John Bushell (1 acre in Griffiths Valuation).
among others...
Hope this helps!