10 THE TOWER MENAGERIE. 
It has been generally remarked, that lions in captivity 
have certain constant and stated times for roaring: this 
observation is not, however, strictly true with regard to 
those now in the Tower. It may nevertheless be observed 
that in the summer time, especially when the atmospheric 
temperature is considerable, they uniformly commence 
roaring about dawn, one of them taking the lead, and 
the others joining in the concert in succession; and 
Mr. Cops has frequently had occasion to remark that 
whenever any one of them fails in accompanying the 
rest in their by no means harmonious performance, the 
cessation from the customary roar is an infallible symp- 
tom of actual or approaching illness. At no other time 
is there that regularity in their roaring which has been 
so frequently stated; although the chorus which has just 
been described is sometimes repeated after feeding, and 
also when they have been left alone for any length of 
time ; hence it occurs particularly on Sundays, a day on 
which they have no company except from the occasional 
visits of the keepers. 
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