you guys are quick... It's taking all I've got to keep up w/you.... so Karen, I too have check marriage records in Ontario-- she was from Verona, Frontenac Co., I believe, and I too have come up w/nothing, at least in that county--online .... will check some of the others on the off chance that maybe she was living elsewhere when hubby #1 died. 
JJ-- I have managed to find the reference to the Chorlton Union files at the Nat. Archives--and materials not yet available for consultation--- my luck!, wouldn't ya know!  However, will keep checking back..   
Indi, So, am I understanding correctly that as early as 1901 that both boys were in the Cheshire Styal, Chorlton Cottage Homes? --- If that William Layfield death that JJ cited was their father, potentially they were there even earlier.... making them orphaned very young.   Is the 1901 reference you cited a National Archives ref as well?  
Am I caught up yet?   I've been shadowing all your moves...hope I didn't miss anything?   You ladies work like a finely oiled machine.... I'm amazed....