look it up on manxnotebook (first time I've known anyone ask where was Athol street - single 'l' = Douglas double 'll' = Peel)!
It is one of the main streets in Douglas - until about 5 years ago had the courthouse in it and thus street was dominated by advocates offices though as a glance at the 1881 census will show you it was lived in by many others.

Atholl st in Peel dates from a little later (c. 1830's rather than 1810's) is developed mostly on only one side (the other is the entrance to cathedral, centenary hall, has the Methodist chapel and relatively few houses on the other