The Geelong Advertiser 17.10.48, p2, noted that on October 16 1848 a Mr Ramsay and 5 children arrived per “David”.
The "David" was a schooner owned by son-in -law Charles McShane. David Ramsay had been operating as an agent in Hobart for immigrants wanting to go to the Port Philip settlement. Advertisements for skilled farm personnel were placed offering free passage.
The schooner "David" (Risdon built and registered in Hobart) was engaged in trade between what is now Victoria and Tasmania moving shingles and building timbers, immigrants from VDL, meat and livestock from Port Phillip.
The "David" was later wrecked off Point Lonsdale, the wreck is Heritage listed.
David Ramsay is accompanied by one more child than he and Dinah (second wife) seem to have had. Was the extra child one of eldest daughter Janet's children (wife of Charles McShane)? Janet had died 'in childbed' the previous year, baby boy not named.
David appears to have walked out of his pawnbroking business at this time. David R. apparently moved to Geelong operating a ropeworks. (see earlier refs on Roots Chat)
He was later operating a store in, or near, Ballarat.
TROVE ref for arrival of Ramsay family:
1848 'ARRIVED.', Geelong Advertiser (Vic. : 1847 - 1851), 17 October, p. 2 Edition: MORNING, viewed 8 June, 2015,
http://nla.gov.au/nla.news-article93136257