"So far, those who have tried to annoy us have succeeded only in furnishing some excitement for us.

Although we've been snowbound most of the time here we've had anything but a dull time." "Is it safe for us all to leave camp at one time ?" inquired Greg.
"If you're asking me," Dick replied, "I don't believe it is.

We can't be sure that Fits, or Fred Ripley's crowd, won't swoop down here at any moment.

It is just the doubt that will make us feel unwise in leaving the camp without any one to guard it.

As far as Ripley is concerned, I don't believe he's going to show up here again.