Yorkshire advanced their first innings from 315-7 to 350 all out during the opening session of day two against Hampshire at the Ageas Bowl.
The White Rose lost Tim Bresnan and Jack Brooks to slip to 319-9, including a fifth wicket for South Africa quick Dale Steyn, before Steve Patterson and Ben Coad shared 31 to secure a fourth batting point.
Patterson hit a useful 37, including back-to-back cut boundaries off Steyn, before miscuing the other South African seamer Kyle Abbott to mid-off to wrap up the innings.
Hampshire then reached lunch at 63-1 from 19 overs of their reply, with Jack Brooks picking up the only wicket when he trapped Joe Weatherley lbw for seven in the fourth over.
Jimmy Adams and captain James Vince have since shared an unbroken 54 for the second wicket.
Adams will begin the afternoon on 21 and Vince on 35.
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