The Records of the East Riding Commissioners of Sewers > Documents formerly given references in Stanewell's Calendar of the Ancient Deeds, Letters, Miscellaneous Old Documents, &c., in the Archives of the Corporation, 1951 > A decree of the Commissioners of sewers that a dam of brick or stone be made at Julian and Derringham Springs in lieu of one of earth in order that the water running into Julian Dyke may be kept pure