ON THE ERRATIC BLOCKS OP ENGLAND, IRELAND, AND WALES. 237 



4. Erratic blocks occur at various levels above the sea. These levels 

 have been given in the reports. 



5. Streams of erratic blocks have — 



(a) crossed each other's paths, so that they have been more or less 



mixed ; 

 (6) gone over each other under circumstances which have prevented 



any mixing ; 

 (c) impinged against each other. 



6. Erratic blocks have been distributed — 



(a) from localities at a considerable distance from their present posi- 

 tions ; as, e.g., from CrifFel to the Midland counties. 

 {h) from hills and eminences in their own immediate neighbourhoods. 



7. With respect to the admixture of erratic blocks the facts recorded 

 show the following differences : — 



(a) Local erratic blocks are sometimes intermixed with those from a 



distance in considerable profusion. 

 (6) Groups of erratic blocks are sometimes found with a very slight 

 admixture of rocks from the immediate locality, and have 

 evidently travelled together as a group. 

 (c) Sometimes groups of erratic blocks contain rocks picked up along 

 the course leading to the mountains from which they are 

 derived ; but this is by no means universally the case. 

 (fZ) In the neighbourhood of various hills purely local groups may be 



found. 

 The Committee have been greatly assisted by the formation of a 

 Boulder Committee in connection with the Yorkshire Naturalists' Union, 

 of which Professor Green, F.R.S., is President, and Mr. S. A. Adamson, 

 F.G.S., the Hon. Sec. 



Were a similar committee organised in each county the work of 

 the Committee of the Association could soon be brought to a satisfac- 

 tory conclusion. 



Durham, 



The following reports have been received (through the Yorkshire 

 Boulder Committee) from Dr. R. Taylor Manson, Darlington. 



Bulmer^s Siowe.— This is a block of Shap Fell granite. 



It occurs on the west side of Northgate, at the edge of the flagged 

 pavement opposite some old cottages, to which it is claimed as an appur- 

 tenance Neai-ly opposite the west end of Garden Street, Darlington, 

 on Ordnance map. By compass circumference N. and S. 13 ft. Sin.; 

 E. and W. 12 ft. 8 in. ; horizontal circumference (1^ ft. from ground), 

 13 ft. 5 in. ; height from ground 3 ft. All portions visible are rounded. 

 It has been moved. No striations ; \>\\i some fractured surfaces smoothed. 

 This boulder is known as ' Bulmer's Stone,' from old Willy Bulmer, who 

 during the excitement of the Peninsular wars used to perch on it and 

 read the newspapers aloud to the neighbours. The origin or age of the 

 tradition contained in the following verse is unknown : — 



In Darnton toune ther is a stane, 



And most strange is yt to tell, 

 That yt turnes nine times round 



When yt heares ye clock strike twell. 



One hundred and fifty-seven feet above sea-level ; marked on the 25-inch 

 Ordnance map. Well shown on a photo of Northgate. It is isolated, 



