you can find photos etc online at
http://www.ee.surrey.ac.uk/Contrib/manx/methdism/chapels/douglas.htm
+ links to all other chapels
the links back will explain tickets etc

There are photos of j R Ellis at http://www.ee.surrey.ac.uk/Contrib/manx/exans/prt_1912.htm
(ps Mona - have a look at my site - think I have all 19th century and earlier churches mentioned bar 1 or two I'm still working on!)