"We have not got three days," answered Benito. "We cannot wait, you know; we must try again, and in some new way."

"What can you do?" answered Manoel.

"Plunge down myself beneath the waters," replied Benito, "and search with my eyes--with my hands."

"Plunge in a hundred times--a thousand times!" exclaimed Manoel. "So be it. I think, like you, that we ought to go straight at what we want, and not struggle on with poles and drags like a blind man who only works by touch. I also think that we cannot wait three days. But to jump in, come up again, and go down again will give only a short period for the exploration. No; it will never do, and we shall only risk a second failure."

"Have you no other plan to propose, Manoel?" asked Benito, looking earnestly at his friend.

"Well, listen. There is what would seem to be a Providential circumstance that may be of use to us."

"What is that?"

"Yesterday, as we hurried through Manaos, I noticed that they were repairing one of the quays on the bank of the Rio Negro. The submarine works were being carried on with the aid of a diving-dress. Let us borrow, or hire, or buy, at any price, this apparatus, and then we may resume our researches under more favorable conditions."