 He led museum expeditions to Zambia and Tanzania in 1963, to Lesotho in 1966 (discovering the oldest articulated fossil mammal skeleton in Early Jurassic rocks), and in 1978 to the Early Cretaceous of Queensland (turning up one of the earliest herrings).A British Council scheme afforded a privileged visit to China, in 1979.It proved the forerunner of a joint field expedition to Sichuan in 1982 by the museum and the Institute of Vertebrate Palaeontology and Palaeoanthropology, Beijing.