I hadn't read the set carefully:

"midge" is usual
"treacle billy depot" instead of "treacle depot"
"James's Gate" is the site of Guinness' Brewery, of course.
"When the milita wasn't wantin', he dealt..." is usual. The sense is "wasn't needed.."

The last line is usually:
"And you'll wind up in the gutter there, like poor ould Mickey Bags."

To the best of my knowledge, there is no evidence for the Zosimus ascription.

Regards