there was a circumstance which at first sight seemed to entangle his delirious but still methodical scheme. but not so in the reality, perhaps. though the gregarious sperm whales have their regular seasons for particular grounds, yet in general you cannot conclude that the herds which haunted such and such a latitude or longitude this year, say, will turn out to be identically the same with those that were found there the preceding season; though there are peculiar and unquestionable instances where the contrary of this has proved true. in general, the same remark, only within a less wide limit, applies to the solitaries and hermits among the matured, aged sperm whales. so that though moby dick had in a former year been seen, for example, on what is called the seychelle ground in the indian ocean, or volcano bay on the japanese coast; yet it did not follow, that were the pequod to visit either of those spots at any subsequent corresponding season, she would infallibly encounter him there. so, too, with some other feeding grounds, where he had at times revealed himself. but all these seemed only his casual stopping-places and ocean-inns, so to speak, not his places of prolonged abode. and where ahab’s chances of accomplishing his object have hitherto been spoken of, allusion has only been made to whatever way-side, antecedent, extra prospects were his, ere a particular set time or place were attained, when all possibilities would become probabilities, and, as ahab fondly thought, every possibility the next thing to a certainty. that particular set time and place were conjoined in the one technical phrase—the season-on-the-line. for there and then, for several consecutive years, moby dick had been periodically descried, lingering in those waters for awhile, as the sun, in its annual round, loiters for a predicted interval in any one sign of the zodiac. there it was, too, that most of the deadly encounters with the white whale had taken place; there the waves were storied with his deeds; there also was that tragic spot where the monomaniac old man had found the awful motive to his vengeance. but in the cautious comprehensiveness and unloitering vigilance with which ahab threw his brooding soul into this unfaltering hunt, he would not permit himself to rest all his hopes upon the one crowning fact above mentioned, however flattering it might be to those hopes; nor in the sleeplessness of his vow could he so tranquillize his unquiet heart as to postpone all intervening quest.