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have confined myself to those which might 

 be made on the immediate banks of water. 

 It would certainly be much more hazard* 

 ous to try such an experiment on a more 

 extended surface : still, I think, that where 

 a great deal is to be dug out in order to 

 make the water, — where there is more 

 earth than is wanting for the head, and 

 where the ground is unvaried, — such arti- 

 ficial risings might be made with good ef- 

 fect, and without appearing unnatural. I 

 judge, in some degree, from what I have 

 seen accidentally produced: it sometimes 

 happens in stony arable grounds, that the 

 stones, with clods of earth, weeds, and 

 rubbish, have been heaped up at different 

 times, and have formed irregular hillocks, 

 which, being unfit for cultivation, remain 

 untouched ; and trees, bushes, fern, and 

 gorse, spring up in many parts of them. 

 These hillocks are artificial : but not being 

 intended for beauty, they are neither ar- 

 tificially formed, nor planted; and conse- 

 quently have the perfect appearance of 

 being natural. I have often been struck 



