The curtain of fog descended again, but Frank was now fairly sure of his position.
"We're heading in the right direction now."
"Should we try to make the boathouse? I don't think we'll be able to find it in this mist."
"I guess you're right. We'll land at the big wharf."
In a short while, the boat was nosing its way through the fog, among the shadowy craft anchored near Bayport wharf. The city loomed up in a ghostly dark mass beyond the water.
Finally the Sleuth drew alongside the wharf and nosed its way to one of the slips. To the surprise of the boys they saw several figures running along the wharf.
"What boat is that?" shouted some one from the fog.
"The Sleuth!"
"Good! That's them. I thought they'd land here," said the voice, evidently addressing some one else on the wharf.
"Looks as if we're expected," observed Joe.