vi FOREWORD. 
compilation of this “ Flora.” His trained faculty for 
observation in other branches of science, notably 
meteorology, combined with an enthusiastic love of 
and sympathy with Nature, constitute him a botanist 
of the first order, and those who are interested in 
the natural history of Orkney have great reason to 
congratulate themselves that such a man has, during 
a very busy life, found time to undertake this work, 
Mr Spence has increased the value of his “ Flora” 
by incorporating the remarks of specialists on the 
doubtful or “ critical” plants which have come under 
his notice. 
The addition of Dr Grant’s “ List of Mosses” will 
be of service to those interested in that beautiful 
but too little known elass. 
W. IRVINE FORTESCUE, M.D. 
