HOW DID THE STRANGER REACH THE CAPTAIN ?

The stranger tricked Jim, and then forced him into taking him to the Captain.

From the text:

"Will any kind friend inform a poor blind man, who has lost the precious sight of his eyes in the gracious defence of his native country, England--and God bless King George!--where or in what part of this country he may now be?"

"You are at the Admiral Benbow, Black Hill Cove, my good man," said I.

"I hear a voice," said he, "a young voice. Will you give me your hand, my kind young friend, and lead me in?"

I held out my hand, and the horrible, soft-spoken, eyeless creature gripped it in a moment like a vise. I was so much startled that I struggled to withdraw, but the blind man pulled me close up to him with a single action of his arm.

"Now, boy," he said, "take me in to the captain."

"Sir," said I, "upon my word I dare not."

"Oh," he sneered, "that's it! Take me in straight or I'll break your arm."

And he gave it, as he spoke, a wrench that made me cry out.