He had drawers for every particular customer's name, which his memory supplied, for he knew every particular drawer, though he had a great many, as well as if their faces had been painted upon them; he had innumerable figures to signify what he would have written, if he could; and his shelves and boxes always put me in mind of the Egyptian hieroglyphics, and nobody understood them, or any thing of them, but himself.
It was an odd thing to see him, when a country-chap, came up to settle accounts with him; he would go to a drawer directly, among such a number as was amazing: in that drawer was nothing but little pieces of split sticks, like laths, with chalk-marks on them, all as unintelligible as the signs of the zodiac are to an old school-mistress that teaches the horn-book and primer, or as Arabic or Greek is to a ploughman.

Every stick had notches on one side for single pounds, on the other side for tens of pounds, and so higher; and the length and breadth also had its signification, and the colour too; for they were painted in some places with one colour, and in some places with anther; by which he knew what goods had been delivered for the money: and his way of casting up was very remarkable, for he knew nothing of figures; but he kept six spoons in a place on purpose, near his counter, which he took out when he had occasion to cast up any sum, and, laying the spoons in a row before him, he counted upon them thus: One, two, three, and another, one odd spoon, and t'other | | | | | | By this he told up to six; if he had any occasion to tell any farther, he began again, as we do after the number ten in our ordinary numeration; and by this method, and running them up very quick, he would count any number under thirty-six, which was six spoons of six spoons, and then, by the strength of his head, he could number as many more as he pleased, multiplying them always by sixes, but never higher.
I give this instance to show how far the application of a man's head might go to supply the defect, but principally to show (and it does abundantly show it) what an absolute necessity there is for a tradesman to be very diligent and exact in keeping his books, and what pains those who understand their business will always take to do it.
This tradesman was indeed a country shopkeeper; but he was so considerable a dealer, that he became mayor of the city which he lived in (for it was a city, and that a considerable city too), and his posterity have been very considerable traders in the same city ever since, and they show their great-grandfather's six counting spoons and his hieroglyphics to this day.
After some time, the old tradesman bred up two of his sons to his business, and the young men having learned to write, brought books into the counting-house, things their father had never used before; but the old man kept to his old method for all that, and would cast up a sum, and make up an account with his spoons and his drawers, as soon as they could with their pen and ink, if it were not too full of small articles, and that he had always avoided in his business.
However, as I have said above, this evidently shows the necessity of book-keeping to a tradesman, and the very nature of the thing evidences also that it must be done with the greatest exactness.

He that does not keep his books exactly, and so as that he may depend upon them for charging his debtors, had better keep no books at all, but, like my shopkeeper, score and notch every thing; for as books well kept make business regular, easy, and certain, so books neglected turn all into confusion, and leave the tradesman in a wood, which he can never get out of without damage and loss.

If ever his dealers know that his books are ill kept, they play upon him, and impose horrid forgeries and falsities upon him: whatever he omits they catch at, and leave it out; whatever they put upon him, he is bound to yield to; so that, in short, as books well kept are the security of the tradesman's estate, and the ascertaining of his debts, so books ill kept will assist every knavish customer or chapman to cheat and deceive him.
Some men keep a due and exact entry or journal of all they sell, or perhaps of all they buy or sell, but are utterly remiss in posting it forward to a ledger; that is to say, to another book, where every parcel is carried to the debtor's particular account.

Likewise they keep another book, where they enter all the money they receive, but, as above, never keeping any account for the man; there it stands in the cash-book, and both these books must be ransacked over for the particulars, as well of goods sold, as of the money received, when this customer comes to have his account made up; and as the goods are certainly entered when sold or sent away, and the money is certainly entered when it is received, this they think is sufficient, and all the rest superfluous.
I doubt not such tradesmen often suffer as much by their slothfulness and neglect of book-keeping, as might, especially if their business is considerable, pay for a book-keeper; for what is such a man's case, when his customer, suppose a country dealer, comes to town, which perhaps he does once a-year (as in the custom of other tradesmen), and desires to have his account made up?
The London tradesman goes to his books, and first he rummages his day-book back for the whole year, and takes out the foot[32] of all the parcels sent to his chapman, and they make the debtor side of the account; then he takes his cash-book, if it deserves that name, and there he takes out all the sums of money which the chapman has sent up, or bills which he has received, and these make the creditor side of the account; and so the balance is drawn out, and this man thinks himself a mighty good accountant, that he keeps his books exactly; and so perhaps he does, as far as he keeps them at all; that is to say, he never sends a parcel away to his customer, but he enters it down, and never receives a bill from him, but he sets it down when the money is paid; but now take this man and his chap, together, as they are making up this account.