He declared he would never come down until it worked satisfactorily.

For two days and nights, and for twelve hours more, he worked without sleep.

He conquered the difficulty.

Then he slept thirty hours.

He often works all night.

He says he can work best when the rest of the world sleeps.

But he likes fun, too.

One day he said to his old friend, of whom he learned telegraphing,

"Look here—I am able to send a message from New York to Boston without any wire at all."

"That is impossible," said his friend.