Mr. Hunter 9 s fupplementary Letter . 16* 
the reft of the fame litter. I communicated my wifh to Mr. 
Symmons, that either his puppy or mine ftiouid prove the fa6t 
to our own knowledge ; which he immediately* with great rea- 
dinefs, acceded to. On the 1 6th, 17th, and 1 8th of Decem- 
ber, 1788, this bitch was lined by a Dog, and on the 1 8th of 
February (he brought eight puppies, all of which (he now 
rears. If we reckon from the 1 6th of December, {he went 
fixty-four days; but if we reckon from the 17th, the mean 
time, then it is fix ty- three days, the ufual time for a bitch to 
go with pup. Thefe puppies are the fecond remove from the' 
Wolf and Dog, fimilar to that given by my Lord Clanbras- 
sil to the Earl of Pembroke, which bred again. (See Philofo- 
phical Tranfadions, Vol. LXXVil. p. 255.) It would have 
proved the fame fad if fhe had been lined by either a Wolf, a 
Dog, or one of the males of her own litter. 
I may juft remark here, that the Wolf feems to have only one 
time in the year for impregnation natural to her, and that is in the 
month of December; for every time Mr. Gough’s Wolf has been 
in heat was in this month, and it proves to be the fame month in 
which Mr. Symmons’s Wolf was in heat ; for his half-bred 
Wolf is nearly of the fame age with mine, and the time ftie 
was in heat was alfo the fame with that of her own mother, 
and the prefent brood correfponds in time with the brood of 
Mr. Gough’s Wolf. 
I am, &c. 
JOHN HUNTER* 
