The miles necessary to be traversed, and other hindrances incidental to the lateness of the hour and the darkness of the night, delayed the arrival of Mr. Aldritch, the surgeon; and more than three hours passed between the time at which the shot was fired and that of his entering the house.
There are no more uses of "incidental" in the book.
Show samples from other sources
Promise me—incidental to the issue—Anglo-Saxon—dirty word—Childe Roland.
Harper Lee -- Go Set a Watchman
Many of the professors used the Socratic method—direct, repetitive, and adversarial questioning—which had the incidental effect of humiliating unprepared students.