As to the position of various units, it is stated on page 74 of Vol. I. that Lieut.-Col. Watson, of the 2nd, was employed with his regiment on a dangerous digging operation to connect a weak point in the line on the night of April 28th, 1915. It should have been added that the entire 1st Brigade took part in this, the 2nd Battalion being on the left, the 3rd in the centre, and the 1st on the right, the 4th Battalion digging in the meanwhile a support trench close in rear. The omission of the description of the part played by the 5th Battalion (Colonel Tuxford) in the Second Battle of Ypres was a serious one, but this is dealt with in the course of the next few pages. The only serious accusation of inaccuracy in the tactical survey of any situation is preferred by those who maintain that the sketch of the action at Festubert is wrong or misleading. I have communicated with Colonel J. E. Leckie, of the 16th Battalion, who, as a major, took a prominent part in the assault and succeeded to the command of the regiment, when his brother, Brigadier-General R. G. E. Leckie, was promoted to a brigade. He assures me that the sketch of the two positions occupied by the Canadians in their successive attacks is quite accurate, and, in fact, it is so. None the less, it is easy to see how the idea that there was an error originated. In an attempt to secure largeness of scale in the map, the area is unduly limited in its scope. The position from which the Canadians attacked is not given, and the extent to which the Germans were forced back is only just indicated. In consequence, the words "First Canadian Position" might be held to imply that this was the line from which they sallied forth instead of the first position they occupied before they advanced to the final attack on the orchard. It is a misfortune if the plan underestimates the ground won by the 14th and 15th. No further serious errors have been suggested so far as Vol. I. is concerned. Mistakes will no doubt be discovered in the second volume. They will be found, however, to apply to the misspelling of the names of individuals and to an occasional mistake or doubt as to the precise position of a particular unit on a certain date, and not, I hope, to any main question of the tactics or strategy of battle.