How her companion laughed. “Why watch it?” she inquired. “We surely will be able to hear it in the dark if it rings. There is very little oil left in the lantern, so we’d better put the light out now, and then, if along about midnight we hear the bell ringing, we can relight it and see who our visitor may be.”

“Nann Sibbett, I’m almost inclined to think that you write those messages yourself, just to tease me, for you don’t seem to be the least bit afraid.” This accusingly.

“Honest, Injun, I don’t write them!” Nann said with sudden seriousness. “I haven’t the slightest idea where the messages come from, but I do know that whoever leaves them does not mean harm to us, so why be afraid? Now cuddle down, for I’m going to blow out the light.”

Dories ducked under the quilt and, a moment later, when she ventured to peer out, she found the room in complete darkness, for, as usual, a heavy fog shut out the light of the stars.

“How long do you suppose it will be before the bell rings?” she whispered.

“Well, I’m not going to stay awake to listen,” Nann replied, but she had not slept long when she was suddenly awakened by her companion, who was clutching her arm. “Did you hear that noise? What was it? Didn’t it sound like a faint tinkle?”

The two girls sat up in bed and stared at the door.

CHAPTER XIV.
A PUNT RIDE

The faint tinkle sounded again. Nann sprang up and lighted the lantern. To her amazement the bell was gone. Surprised as she was, she had sufficient presence of mind not to tell her timid companion what had happened. Very softly she turned the knob. The door was still locked. She glanced at the window; the blind was still hooked. Then, blowing out the light, she said in a tone meant to express unconcern, “All is serene on the Potomac as far as I can see.” After returning to bed, however, Nann remained awake, long after her companion’s even breathing told that she was asleep, wondering what it could all mean. Toward morning Nann fell into a light slumber, from which she was awakened by the sun streaming into the room. Sitting up, she saw that Dories was dressed and had opened the blinds. For a moment she sat in a dazed puzzling. What was it that she had been pondering about in the night? Remembering suddenly, she glanced quickly at the door. There hung the little bell as quietly as though it had never disappeared. Dories, hearing a movement, turned from the window where she had been gazing out at the sparkling sea.

“Good morning to you, Nancy dear,” she said gaily. “O, such a lovely day this is! How I hope that I may go sailing with you and Gib.” Then, as she saw her friend continuing to stare at the bell as though fascinated, Dories remarked, “Well, I guess the ghost took warning all right and stayed away. We won’t find a little paper in our room this morning, I’ll wager.” As she talked, she was crossing the room to the door. Lifting the little bell, she dropped it again with a clang.