ten are--I mean by addressing him as Sir Isaac."

Sophy cut the figures from the multiplication table, and arranged them,
at Waife's instruction, in a circle on the floor. "Now, Sir Isaac." Mop
lifted a paw, and walked deliberately round the letters. "Now, Sir
Isaac, how much are ten times two?" Mop deliberately made his survey and
calculation, and, pausing at twenty, stooped, and took the letters in his
mouth.

"It is not natural," cried Sophy, much alarmed. "It must be wicked, and
I'd rather have nothing to do with it, please."

"Silly child! He was but obeying my sign. He had been taught that trick
already under the name of Mop. The only strange thing is, that he should
do it also under the name of Sir Isaac, and much more cheerfully too.
However, whether he has been the great Newton or not, a live dog is
better than a dead lion. But it is clear that, in acknowledging the name
of Sir Isaac, he does not encourage us to take that of Newton; and he is
right: for it might be thought unbecoming to apply to an animal, however
extraordinary, who by the severity of fortune is compelled to exhibit his
talents for a small pecuniary reward, the family name of so great a
philosopher. Sir Isaac, after all, is a vague appellation; any dog has a
right to be Sir Isaac--Newton may be left conjectural. Let us see if we
can add to our arithmetical information. Look at me, Sir Isaac." Sir
Isaac looked and grinned affectionately; and under that title learned a
new combination with a facility that might have relieved Sophy's mind of
all superstitious belief that the philosopher was resuscitated in the
dog, had she known that in life that great master of calculations the
most abstruse could not accurately cast up a simple sum in addition.
Nothing brought him to the end of his majestic tether like dot and carry