Career
He arrived in August 1832 aboard the ship Florentia. Prior to this time, the young colony of New South Wales had no skilled stonemasons, and so it was almost fate that a chance meeting with the Surveyor-General, Major Thomas Mitchell should result in Lennox—by now a Master Stonemason with twenty years" experience—becoming, provisionally, Sub-Inspector of Bridges and later Superintendent of Bridges. Lennox moved to Melbourne in 1844, to take up a position responsible for bridges in the Portuguese Phillip district.
Lennox retired in November 1853 and returned to New South Wales two years later where he lived in Parramatta.
He died on 12 November 1873, and was buried in old Street John"s cemetery, Parramatta. His gravestone was never marked so it is not known exactly where he was interred.