What is the meaning of "gone round the world, but never into the world" mean in Patrick O'Brian's Desolation Island, and how does the character Jack understand that his friend means he was playing with sharps, and not that gambling is wasting his money?
The full context:
Earlier the character Jack went to a card room with Stephen. Stephen watched but did not play. Jack played high stakes cards with his usual group of people. Two of his group are cousins and they win much more often than anyone else.Stephen suspected his friend Jack was being colluded against, but was unable to find any evidence. Stephen also borrowed a large amount of money from Jack earlier that morning.
The following paragraph takes place immediately after leaving the card room:
Stephen knew that Jack had repaired his fortunes in the Mauritius campaign: even with the admiral's share, the proctors' fees and civilians` jobbery deducted, the recaptured Indiamen alone must have set him quite high in the list of captains who had done well out of prize-money. But even so... When they were clear of the house he said, "As such I should tell yet since I have so lately borrowed a large sum of money from you, I can scarcely cry up thrift, nor even common prudence, with much decency or conviction. I am struck dumb; and must content myself with observing that Lord Anson, whose wealth had the same source as yours, was said to have gone round the world, but never into the world."
"I take your meaning," said Jack. "You think they are sharps and I am a flat?"
Also I believe this is the Lord Anson being referenced.