She was writing.

Presently she stopped--the pen was bad.

She got up and went away to her room.
Instantly Bucklaw laid his plan.

He entered as she disappeared, went to the table and looked at the paper on which she had been writing.

It bore but the words, "Dear Friend." He caught up the quill and wrote hurriedly beneath them, this: "If you'd see two gentlemen fighting, go now where you stopped them last night.