Although this Hornsby land transfer was registered in 1901, it is probable that both buildings existed before this time. The Architectural design of both Cabragh House and the adjoining Amber House indicates a date of construction for both houses somewhere between 1895 and 1905. To support this contention, an original photograph, principally of the two-storey house then at 36 Weka Street, has printed on its reverse “CABRAGH House school & home, Weka Street, Nelson NZ. Late 1890s school started & staffed by Hornsby sisters Charlotte (Lizzy), Ruth & Janetta”. Municipal drain layer plans and sheets also indicate a probable date of erection for both houses in early 1897.