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Marten track (one- third natural size) , showing the four foot marks (not 

 the usual jump, see trails). The black-footed ferret makes a slightly 

 smaller track and shows not quite so much hair. 



parallel trapeze, the evidence of the usual marten 

 motion to which the ferret adheres at all times 

 except in the pursuit of prey. 



There is no reason for mistaking one for the 

 other, because, as aforesaid, they do not inhabit 

 the same locality; but if one does not know of 

 the existence of the wild ferret, then, of course, 



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