Related Clues:

• Collection of mail for the fridge of the army
• Collection of letters from the sentries
• Letters collected from the sentries?
• 'Collection of mail, perhaps, from the sentries (7)'
• Is that the mail the sentry is sending?
• One must be on the lookout for one in mail
• Letters to be sent from the sentry?
• Not letters received by those on watch
• Leg of a race, in French
• Letter sent to a remote station?
• Letters being sent to distant branch
• Letters processed, but settlement far off
• Correspondence published in the 'Gay Times'? It's the end of civilisation!
• Letters awaiting despatch to a colonial settlement
• Place for censored correspondence?