The captain was enthusiastic when he heard of Elsie's idea for the

protection of the main deck--"an excellent notion," he termed it, but

he scouted the suggestion that she should undertake the work herself.

"You little know what hauling taut heavy canvas means," he said when

they met at lunch. "It would tear the skin off your hands. No, Miss

Maxwell, we can put our Chileans on to that job. I have something

better for you to do. Can you map?"

"I have copied heaps of plans for my father," she told him.

"Excellent! At noon to-day I took an observation, so I intend to

devote an hour to revising the chart. Will you help? Joey is in the

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scheme already. Then the Admiralty will gracefully acknowledge the

survey supplied by Miss Elsie Maxwell, Captain Arthur Courtenay, and

Joey, otherwise known as 'the pup.'"

His allusion to the dog by name recalled "José the Wine-bag," but Elsie

thought she would retain that tiny scrap of detective information for

the present. So she simply said: "You will explain to me my part of the undertaking, of course?"

"Certainly. You must first correct the Index Error. Then you subtract

the Dip and the Refraction in Altitude, take the sun's semi-diameter

from the Nautical Almanac, and add the Parallax. Do you follow me?"

"Perfectly; it sounds the easiest thing. But I don't wish to hear the

remarks of the Admiralty when they see the result."

"I am interested in navigation, to the slight extent possible to a mere

yachtsman: may I join you?" interposed Christobal.

"Oh, yes," said the captain off-handedly.

Elsie repressed the smile on her lips. Did the worthy doctor fear

developments if this harmless map-making progressed in his absence?

She imagined, too, that Courtenay's acquiesence in Christobal's desire

to be present was not wholly in accordance with his innermost wish.

She promptly crushed that dangerous fancy. The captain was only

seeking for some excuse to take her away from the rough work of rigging

the extra awnings. How odd that the other thought should have cropped

up first!

"You still think the Kansas will win clear of her difficulties?" she

said rather hurriedly. "I am sorry to bring King Charles's head into

the conversation, but, after all, the ship's safety is essential to

your survey."

"Every hour strengthens my opinion," was the confident reply. "Suarez

says that there is a reasonable chance of occasional brief spells of

fine weather at this period of the year. At any rate, the gale may not

be absolutely continuous, and Walker is assured that he can patch up

the engines for half speed. Given a calm day, a day like this, for

instance, we can reach the Straits in a few hours."

"And the Indians?"

"I leave them out of my reckoning. What else can I do?"