Professor Leonard Haynes, born in Gibraltar, was appointed Head in 1957. Like Cedric Hassall, he was also a graduate alumnus of the laboratory of Professor Alexander Todd at the University of Cambridge. He carried on the impressive research ethic that Hassall had instigated and was instrumental in importing research students into the department. Ian Sangster, for example, first came to Jamaica in 1966 to the Department of Chemistry to spend a year as Research Fellow on a Royal Society Fellowship. He became well known in Jamaica as a result of his creation and marketing of Sangster’s Liqueurs and through his development of the factory side of the Sugar Industry Research Institute’s liqueurs. Under his leadership the Natural Products Research Unit increased the rate at which the department examined the medicinal plants used in Jamaica and the Caribbean, and carried out detailed chemical studies on selected plants. Plants with hypotensive or hypertensive properties received the greatest attention. In 1966 he initiated the Mona Symposium, asking Professor Wilfred Chan to oversee it. The Physical Chemistry aspect of the discipline improved. He also brought state-of-the-art instrumentation to the department, for example, a Varian T-60 NMR spectrometer. During Haynes’ tenure the UCWI became the UWI, a multi-campus institution; and the sub-department of Chemical Technology was moved to the St. Augustine (Trinidad) campus. Professor Kenneth Magnus introduced the teaching of Applied Chemistry in the department in 1968, six years after he was appointed to the academic staff. While Hassall initiated outreach with schools through their teacher organisations, it was Haynes who developed it into Easter Seminars for teachers of Chemistry. This ended when Easter breaks for the university and schools no longer coincided. He also served a number of times as Dean, Faculty of Natural Sciences. He left the university to take up the post of Head of Chemistry at the Open University, UK in 1969.