Newfoundland's Grand Banks Message Board

I was wondering if anyone had information on this family. There was a Walter Mullowney came to Argentia around 1735 (according to Mannion). I'm trying to find any information on his children and grandchildren. Specifically if he had a grand daughter Catherine that may have married Thomas Sparrow in Argentia. I have seen this info on a couple of Ancestry family trees and reached out to try to find the source, but have gotten no replies.