10. The general work of repairing the trenches, fatigues, etc., will be carried out either by day or by night according to company arrangements. Certain hours will be alloted for these tasks, and no man in the company is to be employed in any kind of work out of these hours, unless permission is obtained from O. C. company. 11. No man should ever leave his post in the trenches either by day or by night, without the permission of the N. C. O. in charge of that post. 12. As a general rule, by night there should be at least one sentry post to each ten yards of parapet. 13. By night double sentries should always be posted, if possible, and no sentry should be kept on duty for a longer period than 1 hour at a time. It should be so arranged that when one of the sentries is doing his last 1/2 hour on sentry, his comrade will be doing his first 1/2 on duty. 14. Sentries by night should always have their rifles resting on the parapet ready to fire at moment's notice. 15. As few sentries as possible should be posted by day, so as to give as much rest as possible to the remainder of the men. 16. By day any existing loop holes may be used by a sentry for observation purposes, but this is strictly prohibited at night, =when the sentry must look over the parapet=. 17. If a sentry is continually fired at, the section commander will take steps to post him in another position, but not far away from the original position. 18. By night arrangements must be made in each platoon for a N. C. O.[2] to be continually on duty for the purpose of visiting the sentries, etc., etc. He will report to his company officer at odd hours and to his platoon officer at even hours. 19. Cases have occurred of men going to sleep on sentry duty. This is the most serious crime a soldier can commit on active service. The G. O. C. has clearly stated that in future, if any man has been convicted by court-martial for this offense and sentenced to be shot, he will confirm the sentence. There is no excuse for a man going to sleep on sentry duty; if he is feeling too ill to perform this duty he should report the fact to the N. C. O. on duty of his platoon, who will in his turn report the matter to superior authority. 20. If an armed party of the enemy approaches the trench under a flag of truce, they should be ordered to halt at a distance and lay down their arms, and the matter should be reported at once to the O. C. company. If the party fails to halt when ordered to do so, or does not convey a flag of truce, they should immediately be fired upon. An unarmed party should be halted the same way at a distance, and the matter be reported to the O. C. company. 21. By night it is not necessary to challenge anyone in advance of the trenches, but fire should be opened at once. If, however, the company is sending out listening, working, or covering parties, these orders should be modified, and special instructions issued to meet the case.