The material contained in the apocalyptic discourse in Mk. xiii presents many difficulties in a study of the Synoptic Problem. Not only are there parallels to Mk. xiii in the similar contexts of Matt, xxiv and Lk. xxi, but there is also a considerable body of related material elsewhere, e.g. in Lk. xii and xvii. Farmer devotes more space to this speech than to any other pericope in seeking to explain the changes in the texts on the GH. Before dealing with Mark's version, he considers the Lukan parallel in the light of Matthew's gospel, and claims that Lk. xxi can be easily explained as LkR of Matt. xxiv. Thus, Luke followed Matthew closely up to Matt. xxiv. 8. Then, noticing the doublet in Matt. xxiv. 13 with Matt. x. 22, he turned back to use the material in Matt. x. 17–22 instead of using Matt. xxiv. 9–14, possibly because he preferred Christians being ‘hated by all’ (Matt. x. 22) to being ‘hated by all the Gentiles’ (Matt. xxiv. 9). Other smaller changes are then easily intelligible. In Lk. xxi. 14f., 22, Luke paraphrases Matthew, since he has already used the Matthean material in xii. 1 If. and xvii. 31 respectively, and he wishes to avoid creating doublets. Similarly he omits Matt. xxiv. 23–28 because he has already drawn on this material in chapter xvii. Finally, the changes in Lk. xxi. 20–24 are due to Luke's writing after the events of A.D. 70.