Tony,
The numbering was odd numbers on the south side and even numbers on the north side, in each case starting at the eastern end at the junction with Garscube Road and finishing at the western end at Gardner Street. I think the highest numbers were 107 and 108. Proceeding west from Garscube Road, the first street intersecting on the the south side is Abercorn Street, and the numbers either side of that intersect were 41 on the ease and 43 on the west. So your number 61 was the tenth property west from the intersect, somewhere before you arrive at the Scotia Street intersect.
Does that help?
David.