Laura Lee Hope, The Bobbsey Twins in a Great City (1917)
“ The two flaxen-haired tots were looking down the long platform, into the gloom of the long tunnel of the subway. "Aren't they funny, Freddie?" asked Flossie. "Yep, awfully funny," was Freddie's answer. "What's funny?" asked Bert, wishing he could see something at which to laugh. "Those red and green lights down the track," explained Freddie. "They blink so funny and come up and go out———" "Just like winking at you," said Flossie. "I like it down here. It isn't like the dark tunnels we went in on the steam cars." "Well, I'm glad somebody likes it," said Bert to Nan. ”
