Go and get the worms." He went, and when he came back he found the Doctor sitting beside his father in the verandah, with a penknife in one hand and the ace of spades in the other.

He cut the card into squares, triangles, and parallelograms, while Sam looked on, and, demonstrating as he went, fitted them one into the other, till the boy saw his bugbear of a proposition made as clear as day before his eyes.
"Why," said Sam, "that's all as clear as need be.

I understand it.

Now may I pick the book up, Doctor ?" History was the pleasantest part of all Sam's tasks, for they would sit in the little room given up for a study, with the French windows open looking on the flower-garden, Sam reading aloud and the Doctor making discursive commentaries.

At last, one day the Doctor said,-- "My boy, we are making too much of a pleasure of this: you must really learn your dates.