Martin Zero does a lot of urban exploring around Manchester, of things like old buildings, railways, canals, etc. He has done several videos exploring the River Medlock, and identifies Little Ireland as the area to the south of Oxford Road Station and The Salisbury pub, around Cambridge Street
There is a Red Plaque for Little Ireland on Great Marlborough Street
Search YouTube for 'Martin Zero Medlock IX'.
I used to live in Beswick during the 1960s & 70s.
My Dad worked for Manchester Corporation Direct Works Department. His depot was on Pollard Street, Ancoats