If Oscar's grandmother happened to drop her ball of yarn, when Tige was about, he would seize it in an instant, and she would have to work hard to get it away from him.

She kept her work in a bag, which she usually hung upon the back of a chair; but one day, the little rogue pulled the bag down upon the floor, and had its various contents scattered all about the room, before the old lady noticed what he was doing.
These mischievous pranks were very amusing to Oscar, and he set all the more by Tiger, on account of this trait in his character.

The other members of the family, too, seemed to enjoy the sport he made; and it was easy to see that even old Mrs.Lee, though she pretended to be angry with the dog for his mischievousness, was in reality pleased with the attentions he bestowed upon her and her knitting-work.
Oscar's grandmother usually retired to her chamber, soon after dinner, to take a short nap.

One noon, after she had been scolding, with assumed gravity, about the dog's mischievousness, Oscar thought he would play a joke upon the old lady; so, on rising from the dinner-table, he carried Tiger up to her bed-room, and shut him in.

He wanted to conceal himself somewhere, and witness the surprise of his grandmother, when she should open the door, and the dog should spring upon her; but it was time to go to school, and he could not wait.
It so happened that Mrs.Lee did not take her nap so early as usual that day.