That superb double by Steve Smith at Edgbaston earlier this month was only the fourth time a batsman had exceeded 140 twice in the same Test. Andy Flower followed 142 in Zimbabwe's first innings against South Africa in Harare in 1999-2000 with 199 not out in the second innings, while Tillakaratne Dilshan hit 162 and 143 for Sri Lanka against Bangladesh in Chittagong in 2008-09. But the leader on this particular list is Australia's Allan Border, the only man to reach 150 twice in the same Test: against Pakistan in Lahore in 1979-80 he made 150 not out in the first innings and 153 in the second.
Jofra Archer's promising spell, during his debut Test, at Lord's, lasted all of nine overs, seven of them on the third morning. That's some way from the longest-known spells by seamers: John Lever bowled 31 successive overs for England against Australia in Melbourne in 1979-80 (he finished with 4 for 111 from 53), as did Australia's Mick Malone, in his one and only Test, at The Oval in 1977, while Kapil Dev's career-best 9 for 83, for India v West Indies in Ahmedabad in 1983-84, came in one unbroken run of 30.3 overs. Charles Davis, the eminent Australian statistician, also unearthed a spell by the early Aussie "demon bowler" Fred Spofforth, against England in Sydney in 1884-85, that lasted 48 four-ball overs, the equivalent of 32 six-ballers.
The collar embellishment is actually a representation of a piece of Australian native art called "Walkabout Wickets", by Aunty Fiona Clarke, the great-great-grand-daughter of "Mosquito", a member of the pioneering Aboriginal team that toured England in 1868. According to Cricket Australia, the shirt symbol is a commitment as a team to reconciliation and finding common ground with Aboriginal and Torres Strait Islander peoples.
The answer here depends on the qualification you impose. Dale Steyn leads the way for those who took more than 200 Test wickets, as his 439 victims came at a rate of one every 42.3 balls; next are Waqar Younis (43.4), Malcolm Marshall (46.7) and Allan Donald (47.0). But watch out for Steyn's South African team-mate Kagiso Rabada: so far he has taken 176 wickets at a strike rate of 38.8.
The umpire who was called into action immediately in his first Test was the jovial England-based Aussie Bill Alley. He confirmed that Gavaskar had been caught behind - by Alan Knott off Geoff Arnold - from the very first ball of the match between England and India at Edgbaston in 1974.
"The Surrey pair of Mark Butcher and Alec Stewart [who was his brother-in-law at the time] opened the batting for England in Sydney in 1998-99, and in the first two Tests against New Zealand at home the following summer. So they are the most recent pair from the same county, before Rory Burns and Jason Roy, also of Surrey, this year."
Steven Lynch is the editor of the updated edition of Wisden on the Ashes