The seaplane had stopped short, although its engine still rattled away as vehemently as ever. Perk understood the reason for this–Oscar may have been a hot-headed youngster away back when the great war was on, but apparently his later experiences had cooled his blood to some extent and he did not mean to be too rash.

Doubtless he could by this time plainly make out the sloop which was so skillfully concealed, especially from the air above, and there may have been a sufficiently menacing air about it that called for caution. He was not such a fool as to blindly walk into what might prove to be a clever trap, set by a bunch of those despised Government workers to catch him napping.

Accordingly he considered it good policy to hold off and pepper the sloop from stem to stern before taking any further steps at doing any boarding and seizing it for its rightful owners.

Then again, in order to get the best work from his firearms and have his hands free, he knew he should fix matters so he could drop the controls and pay strict attention to his other job.

Perk was lying low, holding himself in readiness for action. He believed he would be amply protected by the logs he had piled up, but just the same he did duck his head involuntarily at the first crack of the machine-gun the pilot of the Curtiss boat was handling so lovingly, as though it might be an old and valued “baby” in his estimation.

But just the same Perk could not allow any misunderstanding to keep the other in ignorance of how matters stood–he had sent out his impudent challenge, and Perk was quick to accept it.

So the din was further increased by a second barrage, chiming in with perhaps its notes ranged along a little higher key, but on the whole playing skillfully and merrily its own part in the mad chorus that reigned.

How the chatter of those two rapid-fire guns did carry on, with the splinters flying every-which way as the missiles tore them loose from the logs and the coaming of the sloop’s deck.

Perk was compelled to do most of his work while keeping his head down, lest he be potted in that rain of bullets the other fighter was pouring in on him. Consequently he could hardly be expected to do himself full justice. Perhaps Oscar on his part was working under a similar disadvantage, for he really had little in the way of a barricade to intercept the shower to which he was being subjected.

Lucky for him he had shown the good sense to stop his advance with considerable distance separating him from the hidden sloop–had they been closer there was not one chance in ten that some damage would not have placed his seaplane out of commission, even though the pilot himself escaped death.