This sergeant of the Army Hospital Corps appears to be wearing the experimental gray serge uniform issued to British troops during Sir Garnet
Wolseley's failed attempt to relieve General George "Chinese" Gordon at Khartoum during the Nile Campaign  of 1884-5. He is armed with a
Gothic hilted NCO's sword.

Carte de Visite
Pascal Sebah - Photographer
Sur L'Esbekieh, Cairo, Egypt
c. 1884-5