Charles was fastening the lid on a box of Christmas presents which his little brothers were going to send to their cousins.
“If I were you, I’d put another nail on each side,” said grandfather.
“Oh, I think these will hold,” Charles replied, giving the box a little shake. “There are three, on each side.”
“Four would be better,” grandfather said.
“Oh, grandpa, don’t you think three will do?” asked the boy. “I—I haven’t any more.”
“So that is the trouble,” said the old gentleman, laughing. “Very well, here is some money. When you get back from the store I will tell you how the history of a whole great nation was changed for want of a few horseshoe nails!”
“A few horseshoe nails!” exclaimed Charles. “Is it true, grandpa?”
“It is true,” answered grandfather. “Now hurry up if you want to hear how it came about.”
“Oh, thank you!” Charles cried, as he started out of the door.