J.A.Brown died 1925 was previous chair of Derby Castle group and also a prominent Mason (nearly all the tourist business was 'fixed' via one of the lodges!)- PPGM past provincial grand master (the IoM was a province of its own)
see http://www.ee.surrey.ac.uk/Contrib/manx/towns/douglas/fcliff.htm for falcon cliff - would be interested privately in any additional info