asked the Secretary for Mines whether the Geological Survey is to resume the resurveying of the Notts, Derbyshire, and Yorkshire coalfields; and whether any revised official estimate of the area of the concealed portions of those coalfields is to be issued to replace the Estimate made by the Royal Commission on Coal Supplies?

This question concerns the Department of Scientific and Industrial Research, and I have accordingly been asked to reply. The resurvey of the Nottingham and Derbyshire coalfields has been completed. The resurvey of the Yorkshire coalfield may be started this year. The Estimate given by the Royal Commission on Coal Supplies in 1905 was not prepared by the Geological Survey, but the Survey issued, in 1913, a geological memoir on the concealed coalfield of Yorkshire and Nottingham, which included the information then available for publication. The records bearing on this matter are being kept up-to-date, and when sufficient new information is in hand, a revised edition of this memoir may be issued.

Will the right hon. Gentleman see to it that members of the Survey take full advantage of all the colliery plans in the district before issuing their Report?

I am sorry, I did not hear what the hon. Member said.

Will the hon. Member be kind enough to put the question on the Paper?