Suddenly another individual, with a sabre, presented himself.

"Your passports?"

It was the field-guard on his rounds, and, at the same instant, the man from the custom-house came up, having hastened through a ravine.

"Take them into custody for me, Père Morin, or the cliff will fall in!"

"It is for a scientific object," replied Pécuchet.

Then a mass of stone fell, grazing them all four so closely that a little more and they were dead men.

When the dust was scattered, they recognised the mast of a ship, which crumbled under the custom-house officer's boot.

Bouvard said with a sigh, "We did no great harm!"

"One should not do anything within the fortification limits," returned the guard.

"In the first place, who are you, in order that I may take out a summons against you?"