manxnotebook has many items re 19th C douglas - the cd rom version has some photo from 1890 or before linked to a 1868 plan of North Quay area

fa John was an inmate in House of Industry in 1851 age 73 born Lezayre ? bur Braddan 18560318 age 79 - that gives you a couple of possibilities - s/o john caley + margt brew or Matthias + jane cottier - need wills I suspect