The advantage of this fortification is obvious.

On a bonnet appearing, the Captain instantly slipped into his garrison, locked himself up, and took a secret observation of the enemy.
Finding it a false alarm, the Captain instantly slipped out again.

And the bonnets in the street were so very numerous, and alarms were so inseparable from their appearance, that the Captain was almost incessantly slipping in and out all day long.
Captain Cuttle found time, however, in the midst of this fatiguing service to inspect the stock; in connexion with which he had the general idea (very laborious to Rob) that too much friction could not be bestowed upon it, and that it could not be made too bright.

He also ticketed a few attractive-looking articles at a venture, at prices ranging from ten shillings to fifty pounds, and exposed them in the window to the great astonishment of the public.
After effecting these improvements, Captain Cuttle, surrounded by the instruments, began to feel scientific: and looked up at the stars at night, through the skylight, when he was smoking his pipe in the little back parlour before going to bed, as if he had established a kind of property in them.

As a tradesman in the City, too, he began to have an interest in the Lord Mayor, and the Sheriffs, and in Public Companies; and felt bound to read the quotations of the Funds every day, though he was unable to make out, on any principle of navigation, what the figures meant, and could have very well dispensed with the fractions.