"I am not so sure of that," the Spaniard said. "I will know in a few days when I hear from my railroad friends. I expect a letter shortly."

There was some little delay in getting the pictures Blake wanted of the Gatun Dam. Certain work had to be done, and Blake wanted to show the complete and finished structure. So he decided to wait.

About a week after the above conversation with Mr. Alcando, the Spaniard came to the boys, waving an open letter in his hand. The mail had just come in, bringing missives to Blake and Joe. Some were of a business nature, but for each boy there was an envelope, square and of delicate tint—such stationery as no business man uses. But we need not concern ourselves with that. We all have our secrets.

"I have my marching orders," laughed the Spaniard. "I leave you this week, for my own particular jungle. Now I must arrange to get my cameras."

"We'll help you," offered Joe, and then, with the catalogue of a moving picture supply house before them, the boys sat down to plan what sort of an outfit would best be suited to the needs of Mr. Alcando. He was not limited as to money, it was evident, for he picked out the most expensive cameras possible to buy.

"I wish you boys would come and see me, when I get to work taking views along our railroad line," he said. "It isn't altogether a selfish invitation," he added with a laugh, "for I expect you could give me good advice, and correct some of my mistakes."

"I'm afraid we won't get a chance to go to South America," Blake answered.

With a tentative list of what he needed, Mr. Alcando went to write a letter to his railroad officials, asking them to order his outfit for him.

As Blake pushed back his chair, intending to leave the cabin to seek his own stateroom, he saw, on the floor, a piece of paper. Idly he picked it up, and, as he saw it was part of a letter to the Spaniard he folded it, to hand to him. But, as he did so he caught sight of a few words on it. And those words made him stare in wonder. For Blake read:

"Stuff is all ready for you. You had better do the job and get away. There is some fine scenery in Europe."