Sir John Hay Drummond-Hay (1816-93) was the third son of Edward William Auriol Drummond-Hay. In 1829 he became consul-general of Morocco. He was attaché at Constantinople in 1840, and in 1844 he was sent to Morocco as assistant to the consul-general. He became consul-general himself in 1845, then chargé d'affaires, 1847-60, minister resident, 1860-72, and minister plenipotentiary, 1872-86. For further details see the Dictionary of National Biography.