All ten controls are pressed. Before the packet leaves the moor, the clerk recomputes every link himself — and you must wager first: state the rule an honest chain must obey, and what would prove you wrong.
Admiralty packet PKT-PRINCE-001 must reach High Willhays Summit with an unbroken chain of ten control stamps. You fly the observation kite over the 1812 moor: bring each station beacon into your reticle and hold to press its cancel stamp. Somewhere over the moor, a mole in the relay means to cut your chain mid-route — if a stamp is corrupted, fly back, sight the broken station, and re-press the seal before delivery.
W/S glide · A/D bank · R/F soar & dive · E stamp when the reticle holds a beacon
Athelgard rides the observation line with you. She watches how you think.