This map is described as 'shewing the buildings facing the principal streets at the time of survey'. A handwritten note says 'Submitted to the Surveyor General with my letter dated Nov'r 29 1853'. It is signed Clement Hodgkinson, Surveyor.

The buildings shown are colour-coded according to building material. 

The original map is in the collection of the Public Record Office of Victoria, in its Historic Plan Collection. Surveyor-General's Department:  VPRS 8168/P0002 item MELBRL3
https://prov.vic.gov.au/archive/FDB74EAA-F858-11E9-AE98-83693D179613?ima...