[6]
An even number of file-leaders has this advantage over an odd, that it is possible to divide the regiment into a larger number of equal parts.
The reasons why I like this formation are these. In the first place, all the men in the front rank are officers; and the obligation to distinguish themselves appeals more strongly to men when they are officers than when they are privates. Secondly, when anything has to be done, the word of command is much more effective if it is passed to officers rather than to privates.