In the 1770s a group of trustees conducted an annual lottery to raise funds for a “canal of communication” between the Grand Canal and the River Liffey in Dublin. The intention was to go north from the area of the Grand Canal Harbour to reach the Liffey opposite the barracks. It seems that some construction work was done but no lottery was organised in 1780 or thereafter, perhaps because an Irish state lottery was instituted. The plan to build a link to the north was abandoned; the Circular Line was built instead.
Here is an incomplete account of the Grand Canal lottery. I would be glad to hear from anyone who knows more about it.
Out of curiosity why did you highlight Rainsford Street in the second pf the two maps illustrated ?
Note the para reading …
… which mentions Rainsford Street. bjg