Seeing Andrew Hayes name mentioned reminded me that another useful book on the Matlock Bath area is:-
"The Caverns and Mines of Matlock Bath
1 The Nestus Mines: RUTLAND AND MASSON
CAVERNS" by Roger Flindall and Andrew
Hayes, published 1976 by Moorland
Publishing Company.
(n.b. If anyone is interested Amazon.co.uk have a few copies for sale from £3.99 upwards plus £2.75 postage - I did look on your book site Mike first!)
On page 10, Fig. 1 there is a geological map of the Matlock Bath area which shews the line of the major veins and rakes of the area. Unless there is a separate Seven Rakes Great Rake, I always understood that the Bacon Rake running west to east from Low Mine in Bonsall Liberty, known from the mining liberty boundary across Masson Hill to the River Derwent as Bacon Rake, and continuing eastward across the river as Hard Rake, was also known as the Great Rake. Seven Rakes is to the north. I understood that one was walking the line of the Bacon/Great Rake when one walked down the small rift to the entrance of Masson Cavern. I also know that many mines were given the same name e.g.one mine on Bonsall Moor is called the Great Rake too. I would love to read more details about Seven Rakes Great Rake. Can I ask when the possibility of you publishing your book is likely to be historytrog? It will certainly help add more to the present information available of this particular area, and I am sure there are quite a few of us looking forward to it's publication.
As AR and me have mentioned before in previous postings on different subjects on this forum, the Barmaster's maps can only be generalised upon as a rough guide to locating mines, shafts etc., they only indicate one in the direction of a mine, they do not give the exact location. Nellie Kirkham always insisted on this fact, I remember her carrying her big rolls of the 25inch OS map, which she had walked the Wapentake of Wirksworth and the High Peak Hundred parts of the King's/Queen's Field with John Mort who was then the Barmaster, they had walked miles together, drawing on the maps the possible lines of rakes, pipes and veins of the lead field. She'd unroll her maps place them on the ground, kneel down and point out the possible locations of various mines etc., on them, but she always stressed that they were not accurate, they were only to be treated as a guide. She used to quote "Lead and Lead Mining in Derbyshire" by Arthur H. Stokes F.G.S.- which he wrote during the years of 1880/83 as a series of lectures for the Chesterfield and Derbyshire Institute of Mining, Civil and Mechanical Engineers (PDMHS Special Publication No.2 1964) to me repeatedly, in fact she gave me her copy which has lots of printing underlined in red biro, which she considered to be very important. For anyone wanting to know more about rakes, pipe veins, flat work etc., reading pages 13-27 of this publication would find it very interesting.