In the minor arrangements made by us, and the rates fixed for small boats, we have been influenced by the same general principles already mentioned, and have been guided by the further principle of making every class of traffic or boat, however small, liable to some rate of toll, in order to establish a useful and beneficial control over the navigation.
Second Report of the Commissioners for improving the Navigation of the Shannon; with an appendix Ordered, by The House of Commons, to be Printed, 26 February 1841 [88]
Irish waterways history 