Principal Medical Officer Thomas Waller Barrow entered the service as Assistant Surgeon on the 8th July 1841, he became Surgeon on the 26th December 1851; Surgeon Major 8th June 1861; Deputy Inspector General 9th May 1865; Honorary Inspector General on retirement on half-pay on the 20th June 1868. He served with the 2nd Queen's (Royals) in the Sind Desert after the battle of Meenaee in 1843, where four forts were captured. In the Southern Mahratta war of 1844 he was present at the storming and capture of Fort Prunella, and he took part in the campaign in the Concan in 1845, when Forts Monahur and Munsuntosh were captured. He was also engaged in the Kaffir War of 1852-53, and in the Crimean War. In August 1864 he proceeded to Bermuda as Principal Medical Officer of a medical relief force, in consequence of an epidemic of yellow fever, which devastated the troops and population of the islands. For this service he was promoted to the rank of Deputy Inspector-General, the Special General Order issued referring to his "highly meritorious services" in connection with the epidemic. In 1865 he was appointed Principal Medical Officer of Nova Scotia, and in 1866 to the same position at Woolwich and the London District. He died on the 1st July 1900, aged 83.