From the latter circumstance it may be presumed that, whatever might be our heroine’s opinion of him, his [Capt Tilney] admiration of her was not of a very dangerous kind; not likely to produce animosities between the brothers, nor persecutions to the lady. He cannot be the instigator of the three villains in horsemen’s greatcoats, by whom she will hereafter be forced into a traveling–chaise and four, which will drive off with incredible speed. Catherine, meanwhile, undisturbed by presentiments of such an evil, or of any evil at all… (Ch. 16)

Catherine’s departure from Bath in Ch. 20 amusingly fulfills the presentiment of Ch. 16 (above) quite anticlimactically. (;D) Although no animosities develop between brothers or direct persecutions to Catherine, General Tilney gives his son, the captain, a severe reproof for appearing late worrying Catherine that she has lost the captain’s good will:

Captain Tilney at last came down. She was quite pained by the severity of his father’s reproof, which seemed disproportionate to the offence; and much was her concern increased when she found herself the principal cause of the lecture, and that his tardiness was chiefly resented from being disrespectful to her. This was placing her in a very uncomfortable situation, and she felt great compassion for Captain Tilney, without being able to hope for his goodwill. (Ch. 20)

As predicted in Ch. 16 and reinforced by Henry in Ch. 19, Captain Tilney is not one of three villains in greatcoats on the morning of departure and is in fact not of the party. General Tilney and Henry both cover themselves in greatcoats for the trip:

“His [General Tilney’s] greatcoat, instead of being brought for him to put on directly, was spread out in the curricle in which he was to accompany his son.” (Ch. 20)

“And then his [Henry’s] hat sat so well, and the innumerable capes of his greatcoat looked so becomingly important!” (Ch. 20)

Finally instead of four horses being driven off with incredible speed:

“At last, however, the door was closed upon the three females, and they set off at the sober pace in which the handsome, highly fed four horses of a gentleman usually perform a journey of thirty miles…” (Ch. 20)