2 The verses iv. 14--15, which. Volkmar wished to include, but which all other critics reject (see p. 128, note 7), from Marcion's text, Ewald likewise identifies as an isolated couple of verses by the author of our Luke inserted between episodes derived from other written sources. Cf. Ewald, 1. c. {136} of another isolated section attributed by Ewald, to the "Book of earlier history," whilst 28--30, in like manner form another complete and isolated episode, assigned by him to the "eighth recognizable book."(1) According to Ewald, therefore, Luke's Gospel at this place is a mere patchwork of older writings, and if this be in any degree accepted, as in the abstract, indeed, it is by the great mass of critics, then the Gospel of Marcion might be an arrangement different from Luke of materials not his, but previously existing, and of which, therefore, there is no warrant to limit the use and reproduction to the canonical Gospel. The course pursued by critics, with regard to Marcion's Gospel, is necessarily very unsatisfactory. They commence with a definite hypothesis, and try whether all the peculiarities of the text may not be more or less well explained by it. On the other hand, the attempt to settle the question by a comparison of the reconstructed text with Luke's is equally inconclusive. The determination of priority of composition from internal evidence, where there are no chronological references, must as a general rule be arbitrary, and can rarely be accepted as final. Internal evidence would, indeed, decidedly favour the priority of Marcion's Gospel. The great uncertainty of the whole system, even when applied under the most favourable circumstances, is well illustrated by the contradictory results at which critics have arrived as to the order of production and dependence on each other of our three Synoptics. Without going into details, we may say that critics who are all agreed upon the mutual dependence of those Gospels have variously arranged them in the following order: I. Matthew-- {137}