114 TRACTS ON VARIOUS SUBJECTS, &c. 



guished by their skill and knowledge in the matters of which 

 they treat, are received by those with scarcely less persuasi-ve 

 force than the evidence of facts. It is to this class of men I 

 submit the following extracts ; and whilst I recommend them to 

 their serious attention, I must remark that they will find the 

 opinions of Sir John Sinclair, and the experience of Sir Henry 

 Vavasour have most fully corroborated those opinions I have 

 ofFered in the St. Helena Registers, on the subject of increasing 

 the food of cattle, by means of arable land. 



27th Juli/, 1812. K. 



