484 EXPLANATORY INDEX. 



whole subsistence from the ground, and none from the tree, 

 and, as is shown by the sketches of the Ivy Tower on pages 

 43 and 66, nourishes as well on stone walls as on trees. 



The flowers grow in spikes, and are richly perfumed, and 

 the pods are very flat, and open along the side. Yery little 

 genuine vanilla finds its way into England, not more than a 

 few hundred- weight being imported.' Its place is supplied by 

 the common and much cheaper balsam of Peru. 



VULTURE, AURA (Cathartes aura). The name of this bird 

 will always call to mind the memorable controversy between 



VULTURE, AURA. 



Waterton and Audubon, in which the former came off the 

 victor. The whole controversy is printed in the volumes of 

 Essays, and it is too long to be inserted in this book, and too 

 valuable to be judged by means of extracts. I strongly 

 recommend the reader to procure these essays, and admire the 

 masterly manner in which Waterton handled the subject, and 

 the completeness with which he cut away the ground from 

 under the feet of his antagonist. 



