422 



drainage of the country around Hereford was effected by the opening 

 of the valley of the Wye. 



Faults. — In conclusion, the author gives a detailed account of the 

 fault which occurs near the S. E. extremity of the coal-field of the 

 Forest of Dean : and in the course of the memoir, allusion is also 

 made to the fault which has disturbed the coal-measures at Lidbrook 

 valley. 



