i. 27 June 1857 - Kew - Sends introduction to Fern Catalogue. Difficulties with Lycopodium.
ii. 28 September 1857 - Kew - Thanks W.P. for offer of Fern Catalogue interleaved and bound.
iii. 31 March 1860 - Kew 0 Sends cheque. Thanks W.P. for present of Species Filicum.