A new and not unfruitful stage in the literary criticism of the gospels seems to be marked by the recent publication in Germany of three important books. For nearly a century the Synoptic problem has absorbed the attention of scholars. The fascinating riddle of likeness and difference in our first three gospels challenged them to find a solution. It became clear that this was a question of written sources, and for many minds the “two-document hypothesis,” that Mark and some other common written Greek material (Q) are embodied independently in Matthew and in Luke, has come to provide a working basis of investigation, although the categorical denial of this view by the Papal Biblical Commission makes it impossible for Roman Catholic scholars to accept it in its current form. There remain, however, the question of other Greek sources, as, for example, the sources for Mark's and for Luke's special material, and the question of the possibility of Semitic originals, on which no conclusion has been attained and on which perhaps more light may soon be expected from further studies.