A study investigating the effects of "text linguists'" revisions on the comprehensibility of expository prose had as subjects 92 high school juniors who read original and revised versions of two passages from a high school history textbook. The revisions included changes regarding the given-new contract, schemata, reference, lexical cohesion, and cohesive conjunctions. The dependent measure consisted of the number of propositions included in the subjects' written free recall samples. Results indicated significant main effects for both topic (Cold War and Vietnam War) and version (original and revision), with subjects recalling the revised version and the Vietnam passages best. There was also a significant topic by version interaction, with the percentage of total propositions recalled greatest for the revised Vietnam passages. The results suggest that whole-discourse revisions should receive greater empirical and theoretical attention. (Author/MSE)