He was elected in 1884 a fellow of the Linnean Society of London, in which he was an active participant.
[1] His first botanical paper was written in Latin, a language which he wrote with fluency.
He contributed many papers to the Journal of Botany: British and Foreign.
[1] According to T. R. R. Stebbing, Williams visited Naples in the second decade of the 20th century and encountered a fraud involving the supposedly miraculous liquefaction of the blood of Saint Januarius and a pharmacist's preparation of a mixture of ox-bile and crystals of Glauber's salt.
[2] Dianthus mooiensis,[3] Gypsophila cephalotes,[4] Pavetta corymbosa,[5] and Vitex quinata[6] are among the plant names credited to Williams.