that there were too few steam tugs for the work.[1]
Concentration
Concentration can be effected both by road and rail, the former being preferable for short distances, where the railway has only a single line. For example, an army corps that can be moved seventy-two miles by a double line in three days needs seven days to do the same distance by a single line, and only six days by road. But even where lines are double, it is frequently advisable to move a portion of an army by road to leave the railway free for the con-
- ↑ Lieutenant A. C. Dewar, R.N., advocates in his little work, Is Invasion Impossible? p. 53, providing every transport of 5,000 tons with twelve landing-boats —six for horses and six for wagons—and two steam launches, the former to be carried on deck, the latter to be taken in tow.
He admits that the launches present a difficulty, but they are a necessity for rapid disembarkation, and two of them must be assigned to each transport, " the weather being assumedly calm." But if these tugs are necessary and the weather is stormy—what then?—H. B. H.
