Another difficulty which a beginner will meet is this, that sometimes the same technical terms are used in extremely different senses in different systems. The student must know the meaning of each technical term with reference to the system in which it occurs, and no dictionary will enlighten him much about the matter [Footnote ref 1]. He will have to pick them up as he advances and finds them used. Allusions to the doctrines of other systems and their refutations during the discussions of similar doctrines in any particular system of thought are often very puzzling even to a well-equipped reader; for he cannot be expected to know all the doctrines of other systems without going through them, and so it often becomes difficult to follow the series of answers and refutations which are poured forth in the course of these discussions. There are two important compendiums in Sanskrit giving a summary of some of the principal systems of Indian thought, viz. the _Sarvadars'anasa@mgraha_, and the _@Sa@ddars'anasamuccaya_ of Haribhadra with the commentary of Gu@naratna; but the former is very sketchy and can throw very little light on the understanding of the ontological or epistemological doctrines of any of the systems. It has been translated by Cowell and Gough, but I ____________________________________________________________________ [Footnote 1: Recently a very able Sanskrit dictionary of technical philosophical terms called Nyâyakos'a has been prepared by M.M. Bhîmâcârya Jhalkikar, Bombay, Govt. Press.] 3