Related Clues:
- Hiring people of 16
- Literature's characters in 24 down, then across
- Some letter boxes, in a manner of speaking, have windows
- The eight longest answers in this puzzle each have 13 unique ones
- Parts of all answers, some 13 across in some answers singularly found in 14 and 22 across
- Paper containers
- Eleven PO's are terrible gasbags
- Characters in literature
- Written notes
- Characters providing digs?
- Some literature in the post?
- They want tenants with erudition
- Mail for landlords
- There must be hundreds in such correspondence
- They authorise in writing