Who knew how many other secret expeditions might have been digging around?

Some time after dark, the party left their place of hiding and proceeded on their "secret expedition".

Those secret expeditions had begun to seem a dangerous vice.

They were to supply a ship and aid him in a secret expedition to regain the treasure.

To conceal all signs of what's supposed to be a secret expedition.

He was sunk in thoughts of other secret expeditions as he made his way through the soft evening moonlight.

These secret expeditions of his suggest very bad judgment, she said, and could have embarrassing consequences.

That anyone would know of this secret expedition was a vast surprise to the youth.

I think my secret expedition will bring us great credit.

The secret expedition had 33 members plus the Schwabenlands crew of 24.