Hi Margaret Sarah,  - and Hi cousin Deb :-)
Well I don't know about you Debbie, but I am stunned, completely stunned!!  My whole life I grew up hearing about Uncle Tommy & Sissy Sweeney,
I still don't know what to make of it, althought Margaret Sarah you have undeniable proof that it is indeed his marriage.  Which probably explains why neither Debbie or I could find his marriage.  
I have written all this here for the benefit of forum readers, because it's hardly fair for them not to be privvy to outcomes of topics, but I will take you up on the offer of more private evidence now, as I'm sure Debbie will too, unless she's already beat me to it.  :-)
Helen