Related Clues:

• Postman's tote
• Carrier's carrier
• Letter container
• Postal carrier's tote
• Mail holder
• Letter carrier's load
• Letter carrier
• Letter carrier's tote
• Postman's sack
• Postman's burden
• Post pouch
• There may be a post for you in there
• It's a job getting a degree - grand, with letters
• Letters received, making job secure
• A product of confined sewers in the past?