Thanks for the specimens of 'Salix'. Has recently bought volumes one and two of [Johann] Hedwig's "Descriptio et adumbratio microscopico-analytica muscorum" and enquires how to procure a reasonably priced copy of the third volume. Sends what he believes is a specimen of 'Artemisia caerulescens' but may just be a variety of 'Artemisia absinthium', makes some observations in a postscript.