From Aris’s Birmingham Gazette, September 2nd, 1833
“It is with pleasure announced that MR BRADSHAW has completed the Third part of his MAP, shewing the elevations of the Canals, Rivers and Railways of the greater part of England, from a datum of 6 feet 10 inches under the sill of the Old Dock at Liverpool. The levels have been expressly taken for this publication, and carefully examined by some of the leading members of the Institution of Civil Engineers, whose testimonial is subjoined.
Testimonial._ We, the undersigned, having had opportunities of comparing Mr Bradshaw’s Canal Maps with the Lines of Navigation and Levels herein described, have no hesitation in recommending the same as a most useful, correct and valuable work.
Thomas Telford, William Cubitt,
James Walker, J. Brunel.”