i. 14 July 1852 - Lund. - Sends publications, wants publications, algae of Dr.Welwitsch (Response by W.P.).
ii. 4 December 1852 - Lund. - Publications. Replies to W.P. about Drs.Anderson and Hartman (Response by W.P.).
iii. 23 June 1854 - Kew - Plants from Drummond, Funck. Schlim & Jurgensen.
iv. 5 October 1854 - Lund. - Publications.
v. 8 July 1861 - Helsingborg - Plants from Dr. Seemann, Australian algae by Harvey, and his Cape Flora. (Response by W.P.)
vi. 1 May 1863 - Stockholm - Concern at delay in receiving publications and consequential expense. (Response by W.P.).