an Entity references as follows:
William Bull (1828-1902) was an English botanist, nurseryman and plant collector. He was born in Winchester and in 1861 purchased the nursery of John Weeks and Company in King's Road, Chelsea. He introduced into cultivation, plants from other countries, including orchids from Colombia and Liberia. The standard author abbreviation W.Bull is used to indicate this person as the author when citing a botanical name.