File:The 4th Irregular Cavalry.jpg
Formerly the 2nd Regiment of Skinner's Horse, the 4th Irregular Cavalry, took part in the 1st Afghan War (1839-1842) and Gwalior Campaign (1843) before serving during the 1st Sikh War (1845-1846) where they took part in all the major engagements including the battles of Mudki, Ferozeshah and Aliwal.
Bethune Donald Grant (1827-1854) was the son of a surgeon, John Grant and Elizabeth Nicholson Agnes Hayes. He rose to the rank of Lieutenant in the 35th Bengal Native Infantry. He died in Agra on 30 November 1854.