Elie and Hullin guessed what the farmer proposed; they supplied themselves with carts and pushed them into the prison yard.
Scarcely did they enter than small shot and canister received them but the hay and straw deadened the bullets and slugs and only a few rattled on the wheels and shafts. None of the assailants were touched.
As soon as this discharge was fired, two or three hundred musketmen dashed on behind the cart-pushers and lodged under the sloping shed of the bridge itself, under cover of the moving breastwork.
There Billet pulled out a scrap of paper, and flint and steel; he wrapped up a pinch of gunpowder in the paper, struck a light and ignited it and shoved the flaring piece into the heap of hay. Others took lighted wisps and scattered the flames. It caught the pentroof and the four blazing carts set fire to beams high up and sneaked along the bridge supports.
To put out the fire the garrison would have to come out and to show oneself was to court death.
The glad cheer, started in the yard, was caught up on the square where the smoke was seen above the towers. Something fatal to the besieged was surmised to be going on.
Indeed the redhot chains drew out and snapped from the ringbolts. The half-broken bridge fell, smoking and sending up sparks.
The firemen came up with their engines, but the governor ordered them to be fired upon though the prison might be thus burned over the garrison's heads.
The old French soldiers refused. The Swiss were willing, but as they were not artillerists they could not work the carriage-guns. These had to be abandoned.
On the other side, seeing that the cannonade ceased, the French Guards resumed their field-piece work and with the third ball sent the portcullis flying.