A passport or permit to pass, or to go or be abroad.(noun)
A pass or paper furnished to a vessel in order to prevent detention by a ship of war; a safe-conduct.(noun)
The Century Dictionary (Public Domain)
Use "let-pass" in a sentence
"Red Hold; this man, who was old and wise and nothing feeble of body, made much of Birdalone and her folk, and was glad of them when he knew that they had the seal and let-pass of Geoffrey of"
"The inland trade is almost perfectly free, and the greater part of goods may be carried from one end of the kingdom to the other, without requiring any permit or let-pass, without being subject to question, visit, or examination from the revenue officers."
"Hold; this man, who was old and wise and nothing feeble of body, made much of Birdalone and her folk, and was glad of them when he knew that they had the seal and let-pass of Geoffrey of Lea; wherefore he gave them to eat and drink, and lodged them in his own house, and made them the best of cheer."