In concluding Vol. iii. of the ‘Refugium Botanicum’ before Vol. i1., 
it may be desirable to explain that this latter volume is entirely devoted 
to plants of the Orchid family, and that circumstances have not permitted 
me to publish it so rapidly as I have wished. Another number of Vol. ii, 
if not a double number, will be shortly in the printer’s hands. The 
commencing number of Vol. iv. will appear early in the autumn. 
W. W.S:. 
