London 7 August 1797.
My dear brother.
I have the pleasure of introducing to your acquaintance Mr: Mason the King’s botanist, who is going to America with the intention of collecting botanical information and knowledge relative to that Country.
I have had no personal acquaintance with the Gentleman, myself, but at the desire of my worthy friend Mr: W Vaughan of this place, and from a disposition to promote as far as may be in my power the objects of his pursuit, I am happy in recommending him to the attentions and services of my friends and of you in particular.
I am with the warmest fraternal affection, your brother