Estralla did not know why she was so sure that Missy Sylvia had wandered out beyond the barracks; but, since her little mistress was not at Mrs. Carleton's, and had not come to the landing-place, the little colored girl was sure that she must be among the sand-hills, and she ran along calling Sylvia's name as she ran.

Now and then she stopped to listen for some response, or to look about for some sign that might tell her that Sylvia had passed that way, and near the top of one of the little slopes she found a bunch of the green vines and yellow blossoms which Sylvia had dropped.

"She shuah am somewhar near," thought Estralla, and just then she heard a far-off call.

"Dat was my name!" she exclaimed aloud, and listened more intently than ever.

"Maybe 'twas jes' one o' them gull-birds a-callin'," she decided as no further sound came to her ears.

Now she went on more carefully, but she, too, came to the shore; but it was on the inner curve of the land, a little cove where an old shanty stood near the water, and a boat was drawn up near by.

Estralla looked into the rough cabin, half hoping to find Sylvia there. Then she went back a little way and shouted Sylvia's name again and again, and this time there was a response. "Estralla! Estralla!" came clearly to her ears.

"My lan' o' grashus!" whispered the little darky, and then called loudly, "I'se a-comin', Missy Sylvia." And now Sylvia called again. Back and forth sounded the voices of the two girls, each one moving toward the other, for at the welcome sound of Estralla's call Sylvia had sprung up and hurried in the direction from which the voice seemed to come.

It was now so nearly dusk that as they came in sight of each other they were like dark shadows.

"Oh, Estralla! Where is my father?" Sylvia cried as Estralla ran toward her and flung both arms about her little mistress.

"He's a-waitin' fer yo', Missy! Don' be skeered; I'se gwine to take keer of yo'."

"Do you know the way back, Estralla?" asked Sylvia. "I couldn't find the fort."

"No, Missy; I reckon we couldn't fin' nuthin' now, 'tis too nigh dark. But thar's a cabin an' a boat jes' over t'other side o' dis san' heap. I kin fin' them," responded Estralla, turning back. They walked very slowly, for Estralla wanted to be quite sure that they were going in the right direction, and not until they were in sight of the cabin and the shadowy outlines of the boat did she feel safe. Then with a sigh of relief she exclaimed:

"Wat I tell yo', Missy Sylvia! Ain't dar a boat, like what I said? An' don' yo' know all 'bout a boat? Course yo' does. Now yo' can sail us right off home. An' when yo' pa comes home 'mos' skeered to def, 'cos he cyan't fin' yo', thar' yo'll be," and Estralla chuckled happily as if all their troubles were over.

But Sylvia was not so sure. Unless there was a sail or a pair of oars the boat would be of little use, and even with oars and sail could she guide the boat safely to Charleston?

They soon discovered that there was a pair of oars in the boat, but there was no sail or tiller. Sylvia could row, but Estralla could not be of any use. But it seemed the only way in which they could reach either Fort Moultrie or their home, for both the little girls realized that they might wander about the sand-hills all night without finding their way back to the fort. It was chilly and dark, and the old cabin with its sagging roof and open doorway was not a very inviting shelter. Indeed, Estralla was quite sure that a lion, or at the very least a family of wolves, was at that moment safely hidden in one of the dark corners of the cabin.

"The moon is out! Look!" said Sylvia, "and there goes a steamer."

Sylvia did not know that this steamer was a guard-boat which Governor
Pickens of South Carolina had ordered stationed between Sullivan's
Island and Fort Sumter to prevent, if possible, any United States
troops being landed at that fort.

"I can see the fort!" declared Sylvia. "That's it off beyond the boat," and she pointed down the harbor. "Now, we will start. I know I can row the boat that far, and I am sure my father will not go home without us. To-morrow we will send this boat back."

Sylvia had now forgotten all her weariness, and she was no longer afraid. She was sure that in a little while she would be safely at the fort, and then, she resolved, she would at once tell Mrs. Carleton that Mr. Doane had the letter and ask permission to tell her mother of her part in the secret message.

The boat was already half afloat, and it was an easy matter to pull up the big stone attached to a strong rope which served as an anchor, and then to push off from shore.

"You watch, Estralla, and if any other boat comes near shout at the top of your voice," said Sylvia as she dipped the oars into the dark water and pulled off from shore.

"My lan', Missy! Bar's dat............