When they came out again into daylight, poor little Lucy was crying in nurse's arms, so Mrs. Gray took her on her lap, and gave her a biscuit. Then Willie had a game of bo-peep with her, but at this, the old gentleman in the corner looked very cross, and said something about "noisy tiresome children!" to the lady by his side. Mrs. Gray told Willie not to laugh quite so loud, and Willie did as he was told, but he thought the old gentleman as tiresome as the old gentleman had thought him. "I'll ask mamma why he should mind my laughing," he thought. "That's 'two' things I want to know." By-and-bye they stopped at a station, and Willie thought this a good time to ask the first of his questions. "Papa," he said, "what is a tunnel?" "Did you ever see a hill, Willie?" asked Mr. Gray. "Oh, yes, papa—numbers of hills." "Not so very many, my boy. Still you know what a hill is. Now suppose I wanted to make a railroad from my house to Mr. Brown's, how should I manage when I came to Heath Hill?" "Make the train go round, papa," said Willie. "But that would take it so far out of the way. Think of some other plan." "Couldn't the train go over the hill?" asked Willie. "No, uphill will not do. The path must be nearly if not quite level—that is, flat—for the train. Heath Hill is very steep." "Is a tunnel made under the ground, then?" asked Willie slowly. "That is right, Willie. You have found it out now. I should make a tunnel under the hill for the train to go through. Do you not call that a good plan?" "I do not know. It makes such a noise, papa," said Willie, rather gravely. "Who was it that I heard this morning, saying, 'Oh, a noise won't hurt you, Lucy'? You are not so brave now as then, Willie." "Yes, papa—I'm not afraid," said Willie, sitting up straight. "I won't mind the tunnel next time at all. I did not this time so much as Lucy." "Lucy is too young to know any better yet. But you are old enough to learn what a tunnel is, and not to be timid about it." "Are people never hurt in a tunnel?" asked Willie. "Sometimes they are. And sometimes people are hurt when they are driving, and sometimes when they are walking, and sometimes when they are sitting quite quiet in the house. No one can be hurt anywhere, unless it is the will of God; and if it is, then we shall be hurt wherever we are." "Then no one ought to be afraid," said Willie. "No one, Willie, who can feel that God is his Father and will take care of him." The train was now moving on again, but the cross gentleman and the two ladies were gone, so Mr. and Mrs. Gray, and Willie, and Lucy, and nurse were alone. Willie could not help saying, "I am glad he has gone, mamma. He didn't like to see me playing." "He did not like to hear my little boy's noisy laugh," said Mrs. Gray, with a smile. "But, mamma, I wasn't near him."