In the chest were two fur-covered sacks, and these the party used, filling them up to the top.
In the midst of the work a far-away shot was heard. Two more followed in quick succession.
"'Tis an alarm from the yacht," cried the captain. "I told my daughter and Mrs. Cromwell to fire in case anything turned up."
Without delay the sailors were sent off in advance.
Captain Sumner, Bob, and Jack started to follow with the treasure sacks, when a shout went up and a band of the hostile savages appeared at the far end of the ice cave.
"We must run for it!" yelled Bob. "Come on—for the ship!"
"Give them a volley first!" shouted the captain.
Six shots, poured into the advancing troop, threw them into confusion.
As the treasure-seekers turned to run a spear glanced over our hero's shoulder and stuck quivering in the ground a dozen yards beyond.
At the top of their speed they rushed toward the shore.