Thomas Miller Beach (who used the alias Major Henri Le Caron) (September 26, 1841- April 1, 1894) was an English spy. His services enabled the British Government to take measures which led to the fiasco of the Canadian invasion of 1870 and Kiel's surrender in 1871, and he supplied full details concerning the various Irish-American associations, in which he himself was a prominent member. His infiltration of the Fenians and subsequent reports and espionage greatly aided Canada in protecting itself from the Fenian raids which took place from 1866 - 1871.