Instrumentals, datives, locatives and ablatives: the -ϕι case form in Mycenaean and Homer

§1. The Homeric case form in -ϕι corresponds to the Indo-European instrumental plural morph *-bhi(s)2 which roughly corresponds to the senses of the English preposition with, expressing both the instrument of verbal action (‘He killed Dr Black with the lead piping’) and the notion of comitativity (‘He was with Col. Mustard’): yet Homeric -ϕι seemingly stands as a generic oblique case marker in all numbers. Except for literary dialects in which it may be regarded as an epic feature, it was unparalleled in Greek until the decipherment of Linear B demonstrated that Mycenaean knew a case form spelled -pi, which may be taken as standing for /-phi/ (the Linear B script making no distinction between the voiced, voiceless and aspirated stops), functioning probably only as a plural, and in declensions other than the thematic. While -ϕι and -pi have a certain degree of overlap in their function and formations, the Homeric and Mycenaean forms also show significant differences; this paper examines and attempts to explain those differences.