Audit and Report of the Accounts of the Penrhyn Quarry Prepared by Turquand, Youngs & Co., Accountants, 41 Coleman Street, London. This includes a printed document which states to contain an audit of the accounts by Turquand, Youngs & Co. since 31 december 1883 and a consideration to the various matters might come under their notice relating to the mode of conducting the business. 1883-1885