A hunter stalks a dictator, then is hunted
An English sportsman is caught aiming at a European dictator and, escaping, becomes prey himself. The manhunt drives him literally underground into a burrow.

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An English sportsman is caught aiming at a European dictator and, escaping, becomes prey himself. The manhunt drives him literally underground into a burrow.
Stripped of civilization, the narrator regresses to instinct, digging a den and living like a hunted beast. Identity is pared to bare endurance.
The English countryside becomes both hiding place and trap, intimately mapped by a fugitive. Terrain is rendered as psychological pressure.
The regime's agent does not simply kill the besieged man. He wants a signed statement saying the British government sent the assassin, because that document is worth more politically than a corpse. The pursuer's need for the prey's cooperation keeps the prey alive and hands him time and leverage to reverse the siege.
The protagonist survives by applying his knowledge of hunted animals to himself. He moves like a fox, knows how trackers read spoor, and picks a den that uses the terrain. Expertise in pursuit converts directly into expertise in evasion, but that same mindset shows its limit: an earth that hides the animal becomes a trap once the hunter learns where it is.
The hunter insists his stalk was purely sporting: he only wanted to prove he could get within range. Under starvation and confinement he finally admits he meant to kill the dictator, whose regime had executed the woman he loved. A cover story can be sincere to the person telling it and still false, and extreme pressure is what strips it away.