viii and upon wliose advice tire Department succeeded in obtaining the services of Mr. Etheridge, the Author of this and several of the preceding Memoirs. Mr. Wilkinson’s courteous and unassuming demeanour, as well as his large hearted sympathetic nature, will he remembered as long as any of those who enjoyed the privilege of his acquaintance survive him. The record of his scientific labours will endure much longer. I have the honour to be, Sir, Your obedient servant, EDWARD E. PITTMAN, A.R.S.M., Government Geologist. IIaiieie 'Wood, Esq., J.P., Under Secretary for Mines.