i. 19 April 1839 - Thames Ditton - Will call in Queen St. for parcel.
ii. 15 February 1843 - Thames Ditton - Asks advice on obtaining a collection of Scandinavian plants from Copenhagen. Publications. Returning Caucasian specimen "carelessly pressed ... unfit for ... my Herbarium." (Note by W.P. about Reichenbach, etc.).
iii. 16 April 1844 - Thames Ditton - Publications. Dr. Miguel's parcels.
iv. 9 November 1844 - Thames Ditton - Parcel. Publications.
v. 29 November 1844 - Publication.
vi. 8 August 1853 - Thames Ditton - Proofs for him and Mr. Syme. (Reply by W.P. Refers to proofs and London Catalogue.
vii. 23 June 1857 - Thames Ditton - Mr. Syme's delay in Forwarding any proposed alterations in the London Catalogue.
viii. 6 July 1857 - Thames Ditton - London Catalogue new edition.
ix. 7 November 1857? - Thames Ditton - Plants for Guthnick of Berne. Publications.
x. 18 March 1858 - Thames Ditton - Plants for Greeland, Arctic Coasts, Orkney and Mr. Jameson, Surgeon.
xi. n.d. - Acknowledges books. Asks about Portugese plants from Dr. Welwitsch. Is subscribing to E. Bourgeau's journey.