This paper aims at showing that all scholars writing on De iure praedae should refer to the extant manuscript of the work, or to the new electronic edition when it becomes available, to check the passages they use in their arguments. The printed text as edited by Hamaker, though generally reliable as a nineteenth-century edition, must now be considered outdated because of its suppression of all previous stages of the text, as well as its replacement of the original punctuation with (...) a new one, which more than once does affect the meaning of the text. Moreover, Hamaker's edition gives no authentic image of the sources of Grotius's thought. Secondly, signalling a need for more detailed textual research on IPC, the present paper calls attention to Grotius's extensive changes in chapter 10, and to the contribution which philological approaches might make to answering questions such as that regarding IPC's intended audience. (shrink)