Berkshire will go into the final day of their match at Wargrave with victory in their sights. Oxfordshire are leading by just 20 runs with five wickets remaining in their second innings and with their leading spinner Joe Thomas nursing a hamstring injury.
Berkshire lost their third wicket at 208 in the 60th over, with nightwatchman Ollie Birts being bowled for 13 after surviving 96 balls
Waqas Hussain went on to make an excellent 105 from 178 balls before being the fourth man out at 235. The Morris brothers lifted the total to 297, when James was bowled by spinner Joe Thomas for 30 and nine runs later Dan Lincoln was dismissed for a duck, with Gareth Andrew the bowler.
Richard Morris blasted 82 off 79 deliveries before losing his wicket at 343.
Joe Thomas, the Berks keeper, and Chris Peploe unleashed a late surge of runs, finishing on 34 and 20 respectively, so giving Berkshire a useful first-innings lead of 89 runs.
On their return to the crease, Oxon were soon in trouble with Andy Rishton, twice, and Waqas Hussain finding edges to give Thomas three catches in the first 13 overs.
After Peploe had trapped Jordan Garrett (15) lbw, Rishton struck again, having Oliver Clarke snapped up by Dan Lincoln for 27, making it 88-5.
It was an excellent spell of pace bowling from Rishton, as most of the earlier wickets had fallen to spinners.
In the final session of the day it was slow going as Cater and Fitzjohn battled hard to frustrate Berkshire for as long as possible.
By close of play, skipper Cater had moved on to 32 from 89 balls and Fitzjohn 8 after facing 46 deliveries, the pair having taken the score to 109-5 from 60 overs, a lead of 20.
Oxon have an injury worry about their spinner, Joe Thomas, who was forced to leave the field with a hamstring problem after bowling 37.5 overs, taking 4-107. He was also complaining of a touch of sunstroke on what was an extremely hot day.
Berkshire bowling to date: Gregory 8-0-18-0, Rishton 14-3-25-3, Hussain 4-3-2-1, Peploe 21-10-24-1, Birts 9-1-29-0, Raja 4-1-5-0.
Updated 13:00 - 2 Jan 2019 by Dave Wright