So far as the county of Kent is concerned, the mile was certainly longer than the statute mile, and was officially recognized as longer. In 1633 the Mayor and Jurate of Dover Wrote to Sir
Edward Dering, Lieutenant of Dover Castle and the Cinque Ports, complaining of the extra charges exacted by the postmen, saying that the hackneymen of Dover and Canterbury had measured the highway between those two places, and had set up posts at every mile end, and expressed the same to be fifteen miles and & quarter, since which time they demand 3s. 1d. for every horse hire, which is 9d, more than the ordinary rate (State Papers, Domestic, Charles I.' vol, ccxsxviii., May 13, 1633). Sir Edward Dering, in forwarding the complaint to William Trumbull, the Clerk of the Council, explains that, Kentish miles being longer than in some places, the allowance has been 3d. per mile, although in some other places but 2 1/2d. (ibid, voL ccxxxix., May 24). In fact, I have seen on an old map of Kent three scales: one geographical miles, one Kentish miles, and one common miles.
An old rhyme is taken to indicate Kentish miles were longer than the statute mile;
Essex stiles, Kentish miles,
Norfolk wiles, many men beguiles
One theory was the bad state of Kentish roads meant miles seemed longer for travellers. However Notes & Queries (1895) suggests Kentish miles were longer;