CASTLE DANGEROUS AND THE VANISHING STAIRS. 99

This sensation became so unpleasant that she could not help
quickening her steps. The other children were so excited that
they did not dream of looking back, but Primrose turned at last
to see what could be the matter. Then, indeed, her heart stood still.
The little girl discovered that each stair as she stepped upon it
immediately vanished away. There was therefore no possibility of
going back.