The Shelburne escape line

"The only Underground escape line that successfully evaded infiltration by the Gestapo was the Shelburne Line. Allied airmen, rescued after being shot down, were taken to Paris by Resistance members where - after intense interrogation - they received new names, identity cards, clothing, training, and special passes for the forbidden coastal zone in Brittany. They were hidden in "safe house" attics of loyal local farmers, waiting until a moonless night for evacuation to England via the Royal Navy's high-speed Motor Gun Boat 503"--Back cover.