Probably worth a visit to the Manx Museum Library. If you are just interested in 'domestic' buildings in the area, it might be worth looking at the 1st edition OS mapping to see if they are there in c1867. Cottages may be related to the mine.

See: www.manxmines.com/CORNELLY%20MINE.htm

I suppose a look through the 'Patrick' (I think) census for 1841/1851 might allow you to find names of buildings and occupants...

David