Barry,
I'm sorry to say that I don't know Seamus Walker but I have (had) an Uncle-in-Law called Bob Walker who was born, bred and buttered in Dublin so maybe there is a connection back through the generations. But, if he is a Dubliner who loves to sing Dublin songs, well, he can't be too bad a bloke. So, give him my regards anyway.
Also; I enjoy your contributions to the Mudcat. Keep postin', keep singin' an' stay healthy.
Slán.
Frank McGrath
Nenagh Singers Circle