Summary

Portrait of Edgar Allan Poe Edgar Allan Poe Diddling Considered as One of the Exact Sciences (1843)

Nonchalance:—Your diddler is nonchalant. He is not at all nervous. He never had any nerves. He is never seduced into a flurry. He is never put out—unless put out of doors. He is cool—cool as a cucumber. He is calm—"calm as a smile from Lady Bury." He is easy—easy as an old glove, or the damsels of ancient Baiae.
Originality:—Your diddler is original—conscientiously so. His thoughts are his own. He would scorn to employ those of another. A stale trick is his aversion. He would return a purse, I am sure, upon discovering that he had obtained it by an unoriginal diddle.
Source: Wikisource

Portrait of Edgar Allan Poe Edgar Allan Poe Diddling Considered as One of the Exact Sciences (1843)

She finds a sofa well adapted to her views, and upon inquiring the price, is surprised and delighted to hear a sum named at least twenty per cent. lower than her expectations. She hastens to make the purchase, gets a bill and receipt, leaves her address, with a request that the article be sent home as speedily as possible, and retires amid a profusion of bows from the shopkeeper. The night arrives and no sofa. A servant is sent to make inquiry about the delay. The whole transaction is denied. No sofa has been sold—no money received—except by the diddler, who played shop-keeper for the nonce.
Source: Wikisource

Portrait of Edgar Allan Poe Edgar Allan Poe Diddling Considered as One of the Exact Sciences (1843)

This latter word conveys the diddling idea in every respect except that of magnitude. A diddler may thus be regarded as a banker in petto—a "financial operation," as a diddle at Brobdignag. The one is to the other, as Homer to "Flaccus"—as a Mastodon to a mouse—as the tail of a comet to that of a pig.
Interest:—Your diddler is guided by self-interest. He scorns to diddle for the mere sake of the diddle. He has an object in view- his pocket—and yours. He regards always the main chance. He looks to Number One. You are Number Two, and must look to yourself.
Perseverance:—Your diddler perseveres.
Source: Wikisource

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