Conchan = older name for today's Onchan
Douglas until it acquired Borough status in mid 1880s was in civil parish of Onchan but in ecclesiastical parish of Braddan

thus Onchan in pre 1891 censuses covers Douglas - by 91 onwards should just indicate Onchan which by then included North Douglas (ie development north of the town boundary

Harold tower was one of the posher large houses on Douglas Head (at this period just within Douglas Town boundary

Brisbane Street was in the new development of north of old Douglas in Woodville estate about qtr mile west of Villa marina