and, to save himself the labour of telling, he gives him the memorandum or bill aforesaid for his money; this second man does as the first, and a third does as he did, and so the bill runs about a mouth, two or three.  And this is that we call credit, for by the circulation of a quantity of these bills, the bank enjoys the full benefit of as much stock in real value as the suppositious value of the bills amounts to; and wherever this credit fails, this advantage fails; for immediately all men come for their money, and the bank must die of itself: for I am sure no bank, by the simple improvement of their single stock, can ever make any considerable advantage.