There is also another excellent book on the roads and trackways of Derbyshire, it is called "Peakland Roads & Trackways" and was written by A. E. & E. M. Dodd, it was published by Landmark Publishing (now sadly gone into liquidation) in three editions the last one and most up to date being printed in 2000. You should be able to refer to this book plus David Hey's book at your Local Studies Library. If you are unable to do so I believe the Local Studies Library at Matlock has copies of these books, as that is where I consulted the Dodd's book many years ago.
In case you aren't aware there was also another HOWARD family in Derbyshire based at Ashford-in-the-Water who are my ancestors (I am descended from Jane Keeling nee Howard born Ashford 1804 died Ashford 1836), they date back to the 1600's at Ashford but the name was then spelt as HEAWARD, they appear to have been free lead miners and puritans (pp280-281 "The Politics of Social Conflict - The Peak District 1520-1770" by Andy Wood, published by Cambridge University Press 1999). From memory I think that there are Heaward of Ashford documents at the Derbyshire Record Office at Matlock, Derbyshire but you would have to check.
Hope this helps.