see www.manxnotebook.com/history/socs/oddflws.htm

any surviving records are probably held by Manx Museum (library@mnh.gov.im)
ownership of property should now be fully digitised - try Registries (part of WWW.gov.im) tho there may be charges involved - many ground rents seem to have been ceased before WW2 and especially afterwards as inflation reduced their value and owners sold for a cash sum