Career
Was Keeper of Zoology at the Natural History Museum from 1947 to 1957. He is the author of several works on snakes and frogs: discovered a new species of lizard on the Seychelles, which he described and named Vesey-Fitzgerald"s burrowing skink (Janetaescincus veseyfitzgeraldi ) after entomologist Leslie Desmond Foster Vesey-Fitzgerald. Natural History of is honored in the specific name of the following reptiles: Cercosaura parkeri, Chamaelycus parkeri, Emoia parkeri, Leptotyphlops parkeri, Phelsuma parkeri, Prasinohaema parkeri, Sphaerodactylus parkeri, Tropidophis parkeri, and Zonurus parkeri.