The Foxes' cautious approach was entirely understandable owing to the amount of runs they trail by.
Michael Thornely was pinned leg before wicket by Sean Ervine for 12 but Niall O'Brien and Ned Eckersley got to lunch without further problems. The Foxes are 258 runs behind.
Progress was easier for Lancashire at Old Trafford, with the Red Rose 112 for one in response to Worcestershire's first-innings 292. Luke Procter went after a tidy 53 but Paul Horton and Kyle Brown sat tight until the break.
In Cardiff, James Middlebrook frustrated Glamorgan as Northamptonshire extended their lead to 84 runs - the spinner making an unbeaten 33 from 88 balls as the visitors progressed to 218 for six, while Gloucestershire and Essex were held back by the elements.