England must rewrite their own history, and that of Lord's, to win the third Investec Test against South Africa and salvage their world number one status.
After Steven Finn (four for 74) did most to bowl the tourists out for 351 on the fourth evening, England were set 346 to win here and share the series.
That alone will stop South Africa replacing Andrew Strauss' team at the top of the International Cricket Council Test table - and to achieve that end, England must record their own highest successful fourth-innings chase as well as the best too by anyone at the home of cricket.
It was not until Strauss made a double change that Stuart Broad made short work of nightwatchman Dale Steyn, trying to fend off the latest in a succession of short balls and offering a simple catch off the shoulder of the bat to short-leg.
Finn had bowled Hashim Amla through the gate in the first innings, with one that nipped down the slope; this time he got one to go the other way, beat the defence and hit off-stump to end a stand of 85.
Twelve balls later, he had AB de Villiers too - edging a little extra bounce to slip where Strauss took his 121st catch, the most by any fielder in English Test history.
Finn was not finished either, and before tea had Jacques Rudolph edging behind to Matt Prior.
It took another 17.2 overs in the evening session to end the innings, as JP Duminy and Vernon Philander held the hosts up longest in an eighth-wicket stand of 54.
It was an excruciating passage of play, for England supporters, before Philander slapped a James Anderson long-hop straight to point.
An alert piece of stumping by Prior off Graeme Swann then did for Morne Morkel, and Anderson clean-bowled last man Imran Tahir to leave the stoic Duminy unbeaten after 93 balls of defiance. He had contributed only 26 runs, but nonetheless done much to make England's mission improbable even more so.