Many Africanists, anthropologists and linguists greatly benefited from H.E. Lambert's expert knowledge and generous assistance in the field and in their subsequent research. Among those he mentored were A. H. J. Prins, who did ethnographic research on the Taita and, subsequently, the coastal Swahili, and Philip Gulliver who researched the Turkana.
H.E. Lambert's expertise and support significantly aided many Africanists, anthropologists, and linguists in their field work and subsequent research. He mentored A. H. J. Prins, who studied the Taita and coastal Swahili through ethnographic research, and Philip Gulliver, who researched the Turkana.