4 Regent St
May 8th 1846
Sir
In pursuance of a Resolution of the Council of the Zoological Society I have the honour to inform you that you have been admitted as one of the original members of the Society and I am directed to request the payment of your Subscription at your earliest convenience. I beg leave to forward to you the enclosed Prospectus and to solicit your exertions to obtain the accession of others to our list of Subscribers.
I have the honour to be Sir,
your obedient Servant
N.A. Vigors
Secretary
John A. Blake Esq
etc etc etc