They are not Athol Street - yes there were slums - see J Brown's comments written about Douglas mid 19th C
Considerations of space enable me to devote myself to only a mere brief statement of other slumming parts of Douglas. Among these might be mentioned Water Lane, Society Lane, Fancy Street, Hanover Street, Bigwell Street, Little Ireland (or more generally known as " Little Hell "), Athol Court, Shaw's Brow, the " Back Street " (now known as Market Street), Quilliam's Court, Tynwald Court, the district still known as " Senna." In my young days these unsavoury districts, with their utter want of sanitary methods, were a distinct danger to the health of the town, and certainly contributed an undue proportion to the death rate. It is indeed something to be thankful for that the majority of them have been improved, off the face of the earth, or so altered and improved as to be no longer a menace to the public health.

Athol Court had once been good c. 1840's but soon went downhill - my guess is that Browns comments relate to c. 1870's for this part of Douglas (eg look at 1869 list of supported poor for addresses) - it was actually off Shaws Brow (site now rebuilt as one of the new office blocks)