Note 1 — Front matter (continued 2)

A most excellent and detailed account of the operations against Hou-Thué is to be found in "Pirates et Rebelles au Tonkin," by General Frey, published in 1892 by Messrs Hachette et Cie, Paris. The maps of the region and sketches of the position are reproduced from that work by the kind permission of the author and publishers.