"You mean convalescent."

"Um. That's it! Lead me to me bed, will you, for I'm a sadly wounded old soldier—that's what I am."

Amid laughter he was led to a cot, where a smiling nurse tucked him in between the yellow sheets. For, as has been said, yellow takes the place of white in inside scenes.

And this was an inside scene, powerful electric lights dispelling all shadows so the cameras could film every motion and expression.

"Now remember!" called Mr. Pertell when the "wounded man," one of the extra players, had been comfortably put to bed, "remember no smiling or laughing when we begin to make the picture. This is supposed to be serious."

The rehearsal went on and finally the director announced that he was satisfied. Then the scenes were enacted over again, but with more tenseness and with a knowledge that every motion was being filmed with startling exactness.

"Now, Ruth, you come on!" called Mr. Pertell. "We've made a little change from the original scenario. You're to relieve Miss Dixon, who has been on this case. He's one of the Northern officers, you remember, and he has with him papers that the Confederacy would do much to get.

"They are under the officer's pillow, you know. He is afraid to let them out of his possession. You must humor him, though you know that the papers will soon have to be taken away as he is to be operated on. It is here that Alice, as the spy, gets her chance. She pretends to be one of the nurses of this hospital, dons the uniform, and comes in here to get the papers. Are you ready?"

"Yes," answered Ruth.

Then the big hospital scene began.