At this moment the ladder was seen to slip over the threshold, then unroll and fall to the ground.
"Hullo!" cried the sailor, "this is queer!"
"Very strange!" murmured the engineer, leaping first up the ladder.
"Take care, captain!" cried Pencroft, "perhaps there are still some of these rascals..."
"We shall soon see," replied the engineer, without stopping however.
All his companions followed him, and in a minute they had arrived at the threshold. They searched everywhere. There was no one in the rooms nor in the storehouse, which had been respected by the band of quadrumana.
"Well now, and the ladder," cried the sailor; "who can the gentleman have been who sent us that down?"
But at that moment a cry was heard, and a great orang, who had hidden himself in the passage, rushed into
