Pratt departed just before the close, sweeping left-arm spinner Fisher to Mark Alleyne at square leg but Brad Hodge helped Gough to make sure the contest remained evenly poised.
However, Windows (38) played a rash shot off Hodge to be caught at long-on by Pattison and skipper Mark Alleyne departed for a fifth-ball duck after edging a Harmison delivery to Hodge.
In reply, Spearman and James Pearson shared an opening stand of 38 before the latter pushed forward at Mark Davies and was caught at second slip by Hodge.