Lanfranco was a teacher in various schools and a member of many educational boards and committees as well as local and foreign scientific societies. He was the first president of the Natural History Society of Malta, the Din L-Art Ħelwa and various other societies, and president of the Malta Folklore Society. He was awarded the Bronze Medal of Merit by the Conference of Civic Councils in 1969 and the Midalja għall-Qadi tar-Repubblika in 1996.
In 2004 Lanfranco won the annual Literary Prize on Folklore awarded by the Maltese National Council of Books.
Lanfranco has organized various exhibitions, mostly on flora, fauna, geology, science and folklore. Many of his publications and articles, illustrated by himself, have been published in local and foreign papers, magazines and journals. He has also written and lectured on Maltese history. He has organized many exhibitions and given numerous lectures on natural history, archeology, and geology.
- Guide to the Flora of Malta (1955, 1969),
- A Guide to the Fishes of Malta (1958, 1965, 1974),
- Duwa u Semm fil-Ħxejjex Maltin (1975),
- Lampuki u Ħut: Ġabra ta’ riċetti u informazzjoni (1989)
- Ħxejjex Mediċinali u Oħrajn fil-Gżejjer Maltin (1993).
Lanfranco is married to Salvina Bonnici; they have two children, Sandro and Graziella.
The Times of Malta, September 21, 1968, page 2