John Barlow was was an Anglican priest. He was ZSL Secretary from 1837-1838, after which he spent many years at the Royal Institution.
Letters from Robert Ball, Secretary of the Royal Zoological Society of Ireland, to John Barlow regarding the exchange of animals with the Zoological Society of London
Letter from Augustus Elliott Fuller to John Barlow regarding an eagle in his possession which was shot and killed on Anglesey, and may want to be stuffed by the Zoological Society of London
Letter from Thomas Bradley to John Barlow regarding the decision of the Royal Gallery of Practical Science to part with the specimen of the gymnotus electricus
Letter from Braithwaite, Milner and Co. to John Barlow regarding a report on the steam engine and machinery at the gardens of the Zoological Society of London
Letter from William Martin, Secretary of the Bristol and Clifton Zoological Gardens, to John Barlow regarding a specimen they held of an Active Gibbon which they offered for sale to the Zoological Society of London