His father appears to have been an advocate, living at the then new and desirable address of 51, Queen Street in Edinburgh's New Town.
In October 1842 his religious views came to a head in a series of open letters to Bishop Charles Terrot (perhaps fuelled by the impending doom of his church structure).
The conclusion of this was a growing schism, causing Drummond to resign from the Scottish Episcopal Church.
The first call to a public meeting to establish a new church appears in the Caledonian Mercury newspaper on 27 October 1842, predating much of the debate between Drummond and Terrot.
[3] A photograph of Loch Earn dated 1864 is held by the Scottish National Portrait Gallery.
[11] This appears to for one of 16 photographs exhibited by Drummond in 1864, demonstrating a tour of Killin, St Fillans and Loch Earn earlier that year.
An early photograph of Drummond by Hill & Adamson (c.1843) is held by the Department of Special Collections in Glasgow University.