“I don’t know,” said he, “but let’s go to-morrow.  I don’t believe I like so many strangers except when they pay toll.”

They traveled about a good deal; and in a general way enjoyed themselves; but they were both old travelers, and mere novelty was not enough for them.  Each loved the company of the other, but each would have liked to have Locker along.  It grieved Olive to think that she wanted him, or anybody, but she would not even try to deceive herself.  The weather grew cooler, and she said to her uncle:  “Let us go back to the toll-gate; it must be perfectly beautiful there now, with the mountains putting on their gold and red.”

So they started for home, planning for a stop in Washington on their way.

Brightness and people were coming back to Washington.  The air was cooler, and city life was stirring.  Olive and her uncle stayed several days longer than they had intended; as most people do who visit Washington.  On one of these days as they were returning to their hotel from the Smithsonian grounds, where they had been looking at autumn leaves from all quarters of this wide land; many of them unknown to them; they looked with interest from the shaded grounds on one side of the street to the great public building on the other side, which they were then passing, and at the broad steps ascending from the sidewalk to the basement floor.

As they moved on thus slowly they noticed a man standing upon the upper steps of one of these stairs.  His back was toward them; and, as their eyes fell upon him he stepped upon the upper sidewalk.  He was walking with a cane which seemed to be rather short for him.  He stood still for a moment, and appeared to be waiting for some one.  Then, suddenly his whole frame thrilled with nervous action; he slightly lowered his head, and, in an instant, he brought his cane to his shoulder, as if it had been a gun.  The captain had seen that sort of thing before.  It was an air-gun.  Without a word he made a dash at the man.  He was elderly, but in a case like this he was swift.  As he ran he glanced out in the direction in which the gun was aimed.  Along the broad, sunlighted avenue a barouche was passing.  On the back seat sat two gentlemen, well-dressed, erect.  Even in a flash one would notice an air of dignity in their demeanor.

There was not time to strike down the weapon, but before the man had heard steps behind him the captain gave him a tremendous blow between the shoulders which staggered him, and spoiled his aim.  Then the captain seized the air-gun.  There was a whiz, and a click on the pavement.  Then the man turned.

His black eyes flashed out of a swarthy face nearly covered with beard; his soft hat had fallen off when the captain struck him, and his black hair stood up like bristles on a shoe-brush.  He was not a large man; he wore a loose woolen jacket; his sleeves were short, and his hands were hairy.

All this Olive saw, for she had been quick to follow her uncle; but the captain, who firmly held the air-gun, saw nothing but the glaring face of a devil.