from a History of Natural History listserve:
This is to spread the word that digital images of the letters sent to Linnaeus are now accessible online at tp://linnaeus.c18.net/ The collection held by the Linnean Society contains over 4000 letters from 600 different correspondents including letters from such major figures as Joseph Banks, Johan Frederik Gronovius, Johan Christian Fabricius, the Jussieu brothers, José Celestino Mútis, Nikolaus Joseph von Jacquin, Georg Dionysius Ehret, Anders Celsius, Daniel Gabriel Fahrenheit and even Jean-Jacques Rousseau.
To access the letters go to the web site and choose “Letters” to go to the full list. Then choose document type, the author of the letter and the recipient. You will get a list with a number for each letter. This is the code assigned to each individual letter, each begins with an “L”. Click on the number for the one you want and a pop up screen will give you more details. Where there is a (+) sign you can get more information by clicking on that. The images of the letters are in “Manuscripts” and published editions in “Editions”: click on the page numbers for those and you will see the letter. These can be magnified, saved and printed if required. Other options are available on the opening screen or on the left of the screen