Henniker’s uncle Lord John Henniker-Major FRS was a scientific mentor to Ronalds, and had viewed his pioneering electric telegraph in operation.
[2] In the period 1818–21 Henniker travelled through France and Italy to Malta, and thence to Alexandria, Upper Egypt and Nubia.
After revisiting Cairo he went to Mount Sinai and Jerusalem, returning home by Smyrna, Athens, Constantinople, and Vienna.
[3] In 1823 Henniker published an account of his travels[4] and a second edition appeared, with a slightly altered title, in the following year.
In the spring of 1825 he canvassed Reading with a view of contesting that borough in the event of a dissolution, but withdrew his candidature, and died soon after in the Albany, Piccadilly, in the thirty-second year of his age.