"I know I do. We can none of us stay what we were. You haven't either."
"You haven't much to go by," said Helen.
"Seven minutes at the door, wasn't it? This time it's been seven days."
"Yes."
"It's a long time for me," said Peter.
"It's not much out of a lifetime."
"No. But suppose it were more than seven days?"
Helen looked at him and said slowly, "It will be, won't it? You won't be able to go to-morrow."
"No," said Peter, "not to-morrow, or next day perhaps. Perhaps I won't be able to go for the rest of my life."
This time Helen looked at him and said nothing.