E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Old Tom.
Cordial gin. Thomas Norris, one of the men employed in Messrs. Hodges distillery, opened a gin palace in Great Russell Street, Covent Garden, and called the gin concocted by Thomas Chamberlain, one of the firm of Hodges, Old Tom, in compliment to his former master.