The journal of the first tour to the Ohio Indians (July 15-September 22, 1758), was printed in the appendix to _An Enquiry into the Causes of the Alienation of the Delaware and Shawanese Indians from the British Interest_ (London, 1759; reprinted Philadelphia, 1867). This book was published anonymously, but was known to be the work of Charles Thomson, a prominent Philadelphia Quaker, later secretary of the Continental Congress. Thomson gives a brief preface to Post’s journal, and the matter in the notes thereof is evidently by his hand; it is probable that the notes to the second journal are also by him. The first journal was reprinted by Proud, _History of Pennsylvania_ (Philadelphia, 1798), ii, appendix, pp. 65-95, from which edition our reprint has been made. Craig also published this in _The Olden Time_, i, pp. 99-125, following almost verbatim the edition of Thomson and Proud. Rupp, _Early History of Western Pennsylvania_ (Pittsburg and Harrisburg, 1846), appendix, pp. 75-98, gives the same journal. The _Pennsylvania Archives_, iii, pp. 520-544, also contains this journal, evidently taken from the same manuscript, with but slight variations in the spelling of proper names. Heckewelder, _Narrative of the Mission of the United Brethren_ (Philadelphia, 1820), pp. 55, 56, says: “To enumerate all the hardships, difficulties and dangers, Frederick Post had been subjected to on these journies, especially on the first, in the summer of the year 1758, is at this time both impossible and needless. Suffice it to say, that what _he_ intended the public should know, was published in the year after, in England, under the title of ‘Christian Frederick Post’s Journal from Philadelphia to the Ohio,’ &c. His _original_ manuscript journal, however, which had for some time been placed in the hands of the writer of this narrative, was far more interesting, and evinced that few men would be found able to undergo the fatigues of a journey, bearing so hard on the constitution, or a mind to sustain such trials of adversity—at least not with that calmness with which Mr. Post endured it.”