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Fullers Earth ; and I believe Mr. Taunton agrees with me. I 

 dare say many here have heard of a spring called Wintei-well. 

 This spring, like that of the Thames Head, is an intermittent 

 spring, that is, only sending out water in very wet seasons, and 

 in dry seasons ceasing to flow altogether. Some years ago I 

 had occasion to deepen a well in Winterwell Bottom, not far 

 below the spring just mentioned. This well was only ten feet 

 deep, and had become dry. "We sunk it six feet deeper and 

 obtained an abundance of water, and have had plenty ever since; 

 the summer was a dry one. All the materials which were 

 brought to the surface, I recognized as the Shale and Eough 

 Rag Stone, from the top of the Fullers Earth. I was acquainted 

 with the material, having previously sunk several wells into it, 

 and always obtained an abundance of water. One well at the 

 White Way, near Cirencester, is sixty-five feet deep ; another 

 at the Bowling Green Farm, thirty feet deep, and my own well 

 in Thomas-street, Cirencester, twenty-seven feet deep, and I 

 succeeded one dry summer afterwards in getting it three feet 

 deeper into the Fullers Earth. The well in the Market Place 

 at Cirencester, is twenty-six feet deep, and this well has never 

 been known to be entirely dry. 



It will be remembered that last autumn we had some wet 

 weather, and being desirous of fixing the source of these 

 intermittent springs, I invited Professor Morris, who was then 

 lecturing at the Royal Agricultural College^ to go with me to 

 see them. We visited Winterwell Spring first, which is situated 

 in a valley of denudation, and found it discharging an enormous 

 quantity of water. This was on a Friday, and the occupier of 

 the land informed us that "Winterwell broke out middle day on 

 the previous Sunday." We left Winterwell, and drove directly 

 to the Thames Head Spring, which is situate on the south side 

 of the canal, also in a valley of denudation, close to Trewsbury 

 Quarry, where a quarry-man lives. We inquired of him when 

 Thames Head broke out, and were informed, " On the previous 

 Sunday," shewing, as I think, the two springs have the same, 

 source, and continue to flow only while the rock above the 

 Fullers Earth is saturated up to a Hne above the surface of 



