- - One living in school drops a line
- - edge of road in old war
- - Line across the bottom of the United States
- - Boundary of a country
- - Lodger dropping a line
- - Line between countries
- - Separator of states
- - Pupil at Eton, possibly, without a bed?
- - Place for a patrol
- - With 28-Down, theme of this puzzle
- - Kind of line or patrol
- - Line of a kind.
- - Boundary line
- - Land line?
- - Place for a guard
- - Line on a map
- - Dividing line
- - belgian leader has command of country's boundary
- - In the front beautiful arrangement in flowerbed
- - Edging not cut on grass
- - Iffy bishop with request to be served some coke?
- - band leader given command at the frontier
- - lodger loses article at the frontier
- - Road taken through South African frontier
- - Embarrassed, steal back to the frontier
- - bighead taking command at the frontier
- - one who takes ship, we hear, for the frontier
- - River, often
- - Garden planting
- - Frontier
- - The Edge produced British group
- - Soundly, one sleeps in school bed
- - Frontier bishop given command
- - Bass for group with The Edge
- - 'Welcome to . . .' sign locale
- - Way to enter South African frontier
- - Road through old South African frontier
- - Hem that's black or red when turned over
- - Edge second-tier award
- - Canadian/United States divide
- - Neighbour's pupil away from home, we hear
- - Outer part
- - With 25-Down, territorial conflicts (and an alternate title for this puzzle)
- - Canada-United States divide
- - Boundary; edge
- - Bishop with book in bed
- - It separates countries
- - Canadian / United States divide
- - Country side
- - Cormac McCarthy's "......" trilogy
- - With 39-Across, this puzzle's title
- - Country's boundary
- - Guard's locale
- - Fugitive's goal
- - Something to purfle
- - Rio Grande formation
- - Between Tia Juana and Tijuana.
- - ...... crossing
- - Guards
- - Southern ......
- - Abut
- - Outline
- - Touch on
- - Rim
- - Outer boundary
- - Fringe
- - Boundary
- - Frame
- - Land's end?
- - Margin
- - Touch
- - Edge
- - heard paying guest give key command
- - one who goes on the ship, we hear, for the frontier
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