On the other hand, supposing the general editor of the Acts to have made use of written sources of information, and amongst others of the diary of a companion of the Apostle Paul, it is not so strange that, for one reason or another, he should have allowed the original direct form of communication to stand whilst incorporating parts of it with his work. Instances have been pointed out in which a similar retention of the first or third person, in a narrative generally written otherwise, is accepted as the indication of a different written source, as for instance in Ezra vii. 27--ix; Nehemiah viii.--x.; in the Book of Tobit i. 1-3, iii. 7 ff., and other places;s and Schwanbeck has {47} pointed out many instances of a similar kind amongst the chroniclers of the middle ages.(1) There are various ways in which the retention of the first person in these sections, supposing them to have been derived from some other written source, might be explained. The simple supposition that the author, either through carelessness or oversight, allowed the [------] to stand(2) is not excluded, and indeed some critics, although we think without reason, maintain both the third Gospel and the Acts to be composed of materials derived from various sources and put together with little care or adjustment.(3) The author might also have inserted these fragments of the diary of a fellow-traveller of Paul, and retained the original form of the document to strengthen the apparent credibility of his own narrative; or, as many critics believe, he may have allowed the first person of the original document to remain, in order himself to assume the character of eyewitness, and of companion of the Apostle.(4) As we shall see in the course of our examination of the Acts, the general procedure of the author is by no means of a character to discredit such an explanation. We shall not enter into any discussion of the sources from which critics maintain that the author compiled his {48} work. It is sufficient to say that, whilst some profess to find definite traces of many documents, few if any writers deny that the writer made more or less use of earlier materials. It is quite true that the characteristics of the general author's style are found throughout the whole work.1 The Acts are no mere aggregate of scraps collected and rudely joined together, but the work of one author in the sense that whatever materials he may have used for its composition were carefully assimilated, and subjected to thorough and systematic revision to adapt them to his purpose.(2) But however completely this process was carried out, and his materials interpenetrated by his own peculiarities of style and language, he did not succeed in entirely obliterating the traces of independent written sources. Some writers maintain that there is a very apparent difference between the first twelve {49}