Sometimes she rendered captives invisible to their guards; sometimes she broke bonds, chains, and locks; to wit, those of a nobleman by name Cazin du Boys, who in 1418 was taken with the garrison of Beaumont-sur-Oise.
Locked in an iron cage, bound with a strong rope on which slept a Burgundian, he thought on Madame Saint Catherine, and dedicated himself to this glorious virgin.

Immediately the cage was opened.
Sometimes she even constrained the English to unchain their prisoners themselves and set them free without ransom.

That was a great miracle.
One no less great was worked by her on Perrot Chapon, of Saint-Sauveur, near Luzarches.

For a month Perrot had been in bonds in an English prison, when he dedicated himself to Saint Catherine and fell asleep.

He awoke, still bound, in his own house.
Generally she helped those who helped themselves.