I'm not quite sure, however, he was a publican in the Albury-Wodonga region for a while, though apparently returned to Melbourne for a bit after this. Brian passed away in Wodonga in January 2004.
From what I can see, John passed away in 1980; and I can find nothing further on Terry (though have just been told he may have later coached out in country NSW).
I've also just spoken with some older members of the family who remember the Leahy boys bringing Hassa Mann, Brian Dixon and other members of the Melbourne Football Club back to the family farm (at Howlong, NSW) to go fishing and duck shooting back in the 60s. I'd love to find out the truth behind all this, as well as any photos (if they were taken).