A great revenue, half a million, perhaps Since publishing the two first editions of this book, I have got good reasons to believe that all the turnpike tolls levied in Great Britain do not produce a neat revenue that amounts to half a million; a sum which, under the management of government, would not be sufficient to keep, in repair five of the principal roads in the kingdom it has been pretended, might in this manner be gained, without laying any new burden upon the people; and the turnpike roads might be made to contribute to the general expense of the state, in the same manner as the post office does at present.