Don't know if this is any use. An extract from "The Cornish Miner" by HJ.
"Probably the most effectual engine for mine drainage down to 1777 was still the old water-wheel and bobs, which, by Pryce's time, had reached a high degree of efficiency. The small wheels of twelve and fifteen feet diameter placed one above another had formerly done good service, but such "petit engines" had now nearly all been demolished and a single large wheel of thirty or forty feet diameter substituted in their stead. In Cook's Kitchen Mine a water-wheel forty-eight feet in diameter, working tiers of wooden pumps of nine inches bore, drew water from eighty fathoms under the adit, and Pryce was assured that if the stream of surface water had been sufficient to fill the buckets of the wheel, she would have drawn forty fathoms deeper with the same bore. Several of these old wooden pumps have been found from time to time in the course of unwatering long-abandoned mines. Part of the working barrel and the wind bore of one found in Wheal Castle, St. Just, are preserved in the Penzance Antiquarian Society Museum. Another was found more than thirty years ago in Wheal Reeth, near Godolphin Hill. The most interesting of all, however, on account of the illustration which accompanies it, is the description of one found about 1855 in an ancient mine called Wheal Freedom, near the estate of Craskin, in Wendron parish: "Soon after pumping was begun here a column of old wood pumps were found fixed in the shaft. These were of elm-trees and the bore eleven inches in diameter. The working piece valve and wind bore were very remarkable. With the view no doubt to keeping the valve moist there was a bend made in the wind bore arrangement, which the contracted valve way must have greatly interfered with the operation of pumping. The rods and rodbucket had been removed. Much surmise was excited as to the motive-power used for draining the shaft with these pumps, as there was insufficient water in the valley during the greater part of the year and too small a fall to work pumps of such a size. It was thought that the land, being covered with trees at one time, may have attracted more water than at present."
Allen Buckley also mentions that water-powered pumps appeared to have been employed on the Tamar silver mines during the 15th century and Lewis mentions that a water-wheel and suction pump appears to have been used to dewater the Beer Ferris Mines in 1480.
The past is a foreign country: they do things differently there.