A report and survey of the canal, proposed to be made on one level, from Waltham-abbey to Moorfields : also a report and survey, of a line, which may be continued from Marybone to the said proposed canal, in case any future design of navigation to that place, or the north side of London, from the rivers Thames or Coln, should ever take place / by Robert Whitworth. To which is subjoin'd, An address to the Right Honourable the Lord-Mayor, and the Worshipful the Aldermen and Common-council of the city of London, on the importance and great utility of canals in general : the advantages which may fairly be expected from the canal now proposed ... / by James Sharp.