Next day, Saturday, Aug.

21, when Fox went to Hampton Court Palace to keep his appointment, he could not be admitted.

Harvey, the groom of the bedchamber, told him that his Highness was very ill, with his physicians about him, and must be kept quiet.

That morning his distemper had developed itself distinctly into "an ague"; which ague proved, within the next few days, to be of the kind called by the physicians "a bastard tertian," i.e.an ague with the cold and hot shivering fits recurring most violently every third day, but with the intervals also troublesome.
Yet it was on this first day of his ague that he signed a warrant for a patent to make Bulstrode Whitlocke a Viscount.

Whitlocke himself, though he afterwards declined the honour as inconvenient, is precise as to the date.