Hi
The oldest records you can look up online to see where your Sheridan/Partlands may have come from in Ballinrobe is The Tithe Applotments (1823-1837)
http://titheapplotmentbooks.nationalarchives.ie/search/tab/results.jsp?…
Don't see any Partland names in Mayo, nearest families would be Roscommon
Next you could browse through the Griffiths Valuations dated 1850's
http://www.askaboutireland.ie/griffith-valuation/index.xml?action=doNam…
http://www.askaboutireland.ie/griffith-valuation/index.xml?action=doNam…
Sheridans, Ballinrobe : in 1901/1911 Census
http://www.census.nationalarchives.ie/search/results.jsp?census_year=19…
Partlands in Ballinrobe 1901 Census
http://www.census.nationalarchives.ie/search/results.jsp?census_year=19…
Looks like this might be the village, if you look at this link you will see Partlands and Sheridans living here- The Sheridan family names look a lot like yours (esp the last Sheridans listed)
http://www.census.nationalarchives.ie/pages/1901/Mayo/Ballinrobe/Cloonc…
A Nice Site for Ballinrobe Research
http://www.historicalballinrobe.com/
Grave Listings for Ballinrobe/Mayo (families prob spread out into nearby towns)
Findagrave Sheridans =
http://www.findagrave.com/cgi-bin/fg.cgi?page=gsr&GSln=Sheridan&GSiman=…;
Sheridans in Irish Graveyards.ie - nearby Cemeteries, could be Tourmakeady, Ballintubber, Partry, Aughagower, and Robeen. http://www.irishgraveyards.ie/search.php?lastname=Sheridan&firstname=&a…
We have set up a MAYO GENEALOGY GROUP recently on Facebook, if you do have a page there you could ask to join and post queries, we have some members from all of Mayo there, just ask to join....
https://www.facebook.com/groups/clansofmayo/
Hope this is of some help to you, feel free to ask other questions
Dympna