"All that I say," said the inventor quietly, "can be corroborated to-
morrow. Make an appointment with me in the country, and if it chances
to be a calm and sunny day you will no longer doubt the evidence of
your own eyes."

"Where do you wish the experiment to be made?" asked the Minister.

"It must be in some wild and desolate region, on a hill-top for
preference. There should be either trees or old buildings there that we
can destroy, otherwise the full effects can hardly be estimated."

"I have a place in the country," said the Minister, "which is wild and
desolate and unprofitable enough. There are some useless stone
buildings, not on a hill-top, but by the edge of a quarry which has
been unworked for many years. There is no habitation for several miles
around. Would such a spot be suitable?"

"Perfectly so. When would it be convenient for you to go?"

"I will leave with you to-night," said the Minister, "and we can spend
the day to-morrow experimenting."

"Very well," answered Lambelle, rising when the Minister had told him
the hour and the railway station at which they should meet.

That evening, when the Minister drove to the railway station in time
for his train, he found Lambelle waiting for him, holding, by a leash,
two sorry-looking dogs.

"Do you travel with such animals as these?" asked the Minister.