I now left Aden on "sick certificate," and arrived in England in the early part of June 1855. The Crimean war was then at its height, and the military authorities were beating up for recruits in every corner of the land. This summons for war was irresistible. I was suffering a little from blindness, brought on probably by my late losses and impoverishment of blood.[31] Still I lost no time in volunteering my services to take part in this great national object, thinking it was a duty, as a soldier, I owed my country, and delighting in the prospect of immediate and active employment, where, at any rate, I should be in Europe and enjoying the temperature I had come home to seek. The Turkish Contingent was then being incorporated, and I was, being an Indian officer, competent to serve in it. With an introduction from friends, I wrote a letter to Major Graham, an officer appointed by the Horse Guards to engage officers for General Vivian's contingent, giving him an account of my past services, and asking for an appointment with the army. He at once closed with me, declaring "I was just the sort of man he wanted," and, granting two weeks' leave to prepare an outfit, told me to be off. In a fortnight more I arrived in Constantinople, and was posted to a regiment of Turks, with the commission of Captain. The Turkish Contingent was now at Buyukdere, but was soon ordered to embark in vessels and proceed to Kertch in the Crimea. I went with them, and remained serving until the close of the Crimean war. My commandant, Major Greene, being otherwise employed, I, as second in command and Kaimakan of the 16th regiment of infantry, took its headquarters back, and disbanded them at Constantinople.