The most haunting time at which to see them is at the turn of the moon, when they utter strange wailing cries; but the lagoon is dangerous for mortals then, and until the evening of which we have now to tell, Wendy had never seen the lagoon by moonlight, less from fear, for of course Peter would have accompanied her, than because she had strict rules about every one being in bed by seven. She was often at the lagoon, however, on sunny days after rain, when the mermaids come up in extraordinary numbers to play with their bubbles.