census are decennial (see http://www.ee.surrey.ac.uk/Contrib/manx/famhist/genealgy/census.htm)
in 1852 a D. Minay Prospect hill was listed in Quiggin's directory as Organ Builder see http://www.ee.surrey.ac.uk/Contrib/manx/fulltext/qg1841/dir_52.htm
but that is only mention I think