Much anxiety had been expressed, which under present circumstances seems ludicrous enough, as to the means by which the increased number of letters, on which I relied for sustaining the revenue, could be conveyed from town to town. A five-fold increase, it was maintained, would require a five-fold number of mail-coaches; and I was charged with having omitted this material fact in my calculations. Reply was easy, because, first, the existing mail-coaches were by no means fully laden, many of them indeed having very little to carry; and secondly, the chargeable letters formed but an inconsiderable part of the mail; the bulk of which consisted partly of newspapers, and partly of letters and packages sent under franks, insomuch that, startling as this may seem, the chargeable letters then divided among the four-and-twenty mail-coaches which left London every night might, without displacing a single passenger, and without exceeding or even equalling the ordinary load, have been all forwarded by a single coach. In short, instead of being justly exposed to the charge of omission, I had made in my calculations, through excess of caution, more than due allowance for the increased expense, and that by the large amount of £100,000. Fortunately I was able truly to add “that though my plan, with its estimates, had then been before the public for several months, and though both had been submitted not only to the general inquirer, but to the scrutinising examination of those who had most opportunity for acquiring knowledge on the subject, no statement had appeared which invalidated any one of the calculations.” Caution in statement, I may observe, had been strengthened in me by almost all the various trainings through which I had passed. As an instructor, a surveyor, a machinist, an inventor, a responsible secretary to an important enterprise, I had had constant need for its exercise; the more so, perhaps, as I was keenly sensible to the ridicule that follows error, especially in innovators. To return to my immediate subject. By this time, the result of a reduction of postage made six years before in a large portion of the London district, by the extension of the twopenny range, had been shown to be favourable; a return on the subject having been called for by the Commissioners of Post Office Enquiry. It had been calculated by the Post Office authorities that this reduction would reduce the gross revenue to the extent of £20,000 per annum; whereas at the end of six years the revenue, instead of being a loser, was by £10,000 a gainer.[143] Considerable reductions, also, had recently taken place in the postage of foreign letters; reductions already followed by a great increase in receipts. Neither had any instance occurred, within my knowledge, in which reduction of postage had, after a fair trial, been attended with loss to the revenue.