Mushet was born at Dalkeith, near Edinburgh on 10 November 1782, and died at Edmonton, Middlesex on 1 February 1828. His elder brother, David Mushet, was an iron-master and metallurgist who patented new ways of making steel and wrote several works on the subject. Mushet's education is not known, but in 1804 at the age of twenty-two he entered the service of the Royal Mint as a clerk; in 1808 he was listed as third clerk to the master of the Mint. He was eventually promoted to first clerk, the post he held at the time of his death. Mushet had some interest in metallurgy, and in 1823 received a patent for a copper alloy to be used in the sheathing of ships’ hulls, but his mark was largely made as an administrator and writer.
From The Biographical Dictionary of British Economists in Oxford Reference.