The list of self-inflicted problems also grew. Devendra Bishoo, who had bowled just two of the first 70 overs in the innings, had Moeen caught behind off a no-ball on 32. It was an excruciatingly close call from S Ravi, with no recourse to check, in a match where plenty of no-balls have been missed but there was no reason for Bishoo to be so close to the line. Earlier in the day, Malan was dropped at slip on 29, one over after Root had departed, caught at the second attempt by Shai Hope in the gully. It could have been a crucial double breakthrough, but instead it was a reminder of Root's own let-off, 62 runs earlier on the third day, when Shai's brother, Kyle, had been the culprit.
Malan's innings was the least eye-catching of the day - he added 40 off 121 balls to his overnight score - and his tendency to drive away from the body should have brought his downfall, but Kieran Powell was put off at first slip when Shane Dowrich dived across him. Had it been taken, England would have been five down with a lead of 44. But he played an important part in forging England's position and in a batting line-up that doesn't lack for stroke-makers, the ability to soak up deliveries is valuable. The innings has probably booked him an Ashes tour.
He was never fluent, needing 162 balls for his fifty, but he featured a stand of 118 with Root before the 91 with Stokes, who followed up his first-innings century with a 92-ball fifty. It was the second time Stokes had scored a century and a fifty in the same Test, the other being against New Zealand at Lord's in 2015 when England also managed overturn a significant deficit. He was especially fluent after lunch, adding to the list of the blistering drives which have studded his performance across this match, as he took advantage of a tiring Gabriel with four boundaries in 11 balls.
However, the shot that brought his dismissal should not escape some criticism, particularly as England's lead had yet to get out of sight. Credit is due to the bowler, Chase, who got the ball to grip a touch out of the rough but picking out a man on the fence first ball after a break is not a good look.
There was less blame attached to Malan's dismissal. Earlier in the over, Chase had got a ball to jump from the rough and almost lob to point - something that will interest Moeen with ball in hand - and he was caught on the crease when a delivery straightened to take off stump. Bairstow was quickly out of the blocks with four boundaries, but then tried to reverse sweep Chase out of the rough and dragged on. England were far from safe, yet by the end of the day they were the only side with a realistic chance of victory.