90th Regiment of Foot

Chronology

1794 raised as the 90th Regiment of Foot in Scotland as a light infantry corps
1802 became the 90th Regiment of Foot (Perthshire Volunteers)
1815 became the 90th Regiment of Foot (Perthshire Volunteers) (Light Infantry)
1881 amalgamated with the 26th (The Cameronian) Regiment of Foot to form The Cameronians (Scotch Rifles)
1968 disbanded

Records of the 90th Regiment, (Perthshire Light Infantry) ; with roll of officers from 1795 to 1880 by Alexander Marin Delavoye 1880 Archive.org. The Regiment sailed for Ceylon in 1836, page 95
"The 90th Perthshire Light Infantry" from The Lowland Scots Regiments : their origin, character and services previous to the great war of 1914 edited by Sir Herbert Maxwell 1918 Archive.org. The Regiment sailed for Ceylon in 1836, page 284
Memories of Seven Campaigns: a record of thirty-five years' service in the Indian Medical Department in India, China, Egypt, and the Sudan by James Howard Thornton, Deputy Surgeon General, Indian Medical Service, late Principal Medical Officer Punjab Frontier Force. 1895 Archive.org. (The author was in the Bengal Medical Service 1856-1891). Chapters II-IV cover the Indian Mutiny period. During this time Thornton was attached to H M 5th Fusiliers, then H M 90th Light Infantry, then the 1st European Bengal Fusiliers.