A modest plea for private mens preaching. Or An answer to a booke intituled, Private men no pulpit men; composed by Master Giles Workman. Wherein the thing in controversie is briefly debated; the examination of private mens preaching examined; also certain accusations wip'd away and removed. / By John Knowles a preacher of the gospel, formerly in and neer Glocester, now belonging to the life-guard of his Excellency Sir Thomas Fairfax.