"But we have no linen."
"No, but our leather bed-bags are lined with that coarse sort of stuff they cover mattresses with."
"Tick, you mean?"
"Yes, tick. Now, it struck me that this would do for the crackers. We should have to cut it in strips three or four times the width of the cracker. Then we could get Maria to make us some stiff paste; starch would be better, but of course we have none. Then, taking a strip of the cloth, we would turn over one side of it an inch from the edge to make a sort of trough, pour in the gunpowder, carefully paste all the rest of it and fold it over and over, and then, when it begins to dry, double it up and tie it with string. We should then only have to add touch-paper, which, of course, we could make out of anything, and put into the end fold. We could break up a few of the cartridges, soak them in wetted powder, and then cut them up into small pieces and stick them into the ends of the crackers. I think that would do first-rate. I have made dozens of crackers, and feel sure that I could turn out a good lot of them now. The squibs will be easier; we should only have to paste one side of the strips and roll them up so as to form suitable cases. When these are dry we should put a thimbleful of powder into each, and then fill them up with powder and charcoal. In order to make sure of a loud bang we could undo a piece of rope and wind the strands round each case for an inch and a half from the bottom. Of course, when we had ground down the burned wood we would mix it with powder and try one or two of the squibs, so as to find the proportions of charcoal to be used."
"You have evidently thought it all out well, and I think it does you no end of credit. I authorize you to begin the experiment at once. The first thing, of course, will be to get some wood and char it. I should think that you would require at least two pounds of that to two pounds of powder; but you had better only do a little at first—just enough to make an experiment. You know it will require ramming down well."
When Dias, who was on watch, returned he found Bertie at work burning pieces of wood and scraping off the charred surface. Harry explained the plan to him. As he had frequently seen fireworks at Lima, Dias quickly grasped the idea.
"It is splendid, señor; those things will frighten them far more than guns. They will think so many devils have got among them, and we will heighten the effect by discharging every piece that we can among them. In their confusion they will think it is the fireworks that are killing them. That would be necessary, for otherwise when they recovered from the panic and found that no one had been hurt, they might summon up courage to return."
At noon the next day Bertie with assistance had four squibs and two crackers ready for trial. The squibs contained respectively one, two, three, and four parts of charcoal to one of powder.
"Don't hold them in your hand while you are trying the experiment, Bertie. Lay them down on that stone one by one and touch them off with a burning brand from the fire, and take care that you have a good long one."
All, with the exception of José who was on watch, gathered round. The first squib exploded with a bang, the second did the same, but with less violence, the third went off in an explosive spurt, the fourth burned as a squib should do, though a little fiercely, and gave a good bang at the end.