Arrowsmith by Sinclair Lewis

With the heat and the threat of hurricanes, there were few first-class passengers on the St. Buryan, and most of these did not count, because they were not jolly, decent Yankee tourists but merely South Americans. As tourists do when their minds have been broadened and enriched by travel, when they return to New Jersey or Wisconsin with the credit of having spent a whole six months in the West Indies and South America, the respectable remnant studied one another fastidiously, and noted the slim pale man who seemed so restless, who all day trudged round the deck, who after midnight was seen standing by himself at the rail.

"That guy looks awful' restless to me!" said Mr. S. Sanborn Hibble of Detroit to the charming Mrs. Dawson of Memphis, and she answered, with the wit which made her so popular wherever she went, "Yes, don't he. I reckon he must be in love!"