“‘Of course I don’t!’ she said, for she always was on her guard against my making fun of her. ‘Let’s crawl in.’
“‘All right,’ said I, touching the brick walls to make sure I hadn’t made a mistake; and then I followed her inside through the gloomy opening.
“‘Will it get my dress dirty?’ Margaret asked, out of the darkness.
“‘No, indeed,’ said I. ‘They have to keep these ovens clean as can be. They’re fussy about every speck of dust.’
“I had hardly finished when the iron door behind us shut with a resounding clang. One of the workmen who had come back to work had closed it!
“‘O Bob,’ cried my sister, with a little scream of fright, ‘we’re shut in!’
“‘Like two biscuits,’ I laughed. ‘Don’t you mind. All we have to do is to shout and some one will come.’
“But Margaret was really scared, and groped her way near me to put her hand on my shoulder. I confess the darkness and the close, stuffy air were far from cheerful.
“I began to call as loud as I could, and not getting any answer, I crept over to the solid iron door and began kicking it with my heels. After a moment I stopped, breathing hard from my exercise, and then I heard Margaret’s voice behind me, saying:
“‘Wait a minute, Bob! Listen!’