Do you have information on William Frederick Irwin in Ireland. I went to the census of Ireland for 1901/1911 to see if I could find anything on Annie Quigley/Quinley. Quinley is a very uncommon name with only 4 surname in both census. Quigley is the common surname with numerous Annie's listed.
This may be William Frederick in 1901
Cavan/Canningstown/Ardmone East
House 1
Irwin, William age 45
Elizabeth, age 45
Thomas R. age 16
William F. age 14
Margaret A age 12
Martha E age 7
Same family in 1911, house 3, Ardmone East
William Irwin, age 55
Elizabeth, age 57
Maggie Anne, 22
Martha Elizabeth, 17
I didn't find Thomas or William on the 1911 census.