Pal.gr.108

And the of the eme and emoi, and the accusative eme. Primary pronouns do not have vocative cases. The nominative and the accusative of the dual [forms] are nōi and nō. The genitive and dative of the dual [forms] are nōin and nōn. The nominative of the plural [forms] is hēmeis and hēmes; and in Doric and Aeolic, amme. In accordance with the analogy of this nominative, in Attic both the nominative and the accusative of these duals is amme. The genitive is hēmōn [and] hēmin. The dative is hēmin; [when pronounced] monosyllabically, the [vowel] before the i i will have a short quantity, as if it had not derived from hēmin. For, in general, every dative has the i short. But the [form] from hēmin is omitted. By analogy with hēmas and hēmōn, which have a long final syllable, it [the dative] has a long i. This [usage] prevailed among the later writers. Among the poets, however, the i is sometimes taken as long with a circumflex accent, and sometimes as short with an acute accent. And in Doric and Aeolic, ammin. And the accusative is hēmas and hēmas. Of the second person, the nominative is sy; and in Doric, ty. When it is orthotone, it is declined. The nominative sy [takes] an accusative. The vocative also prevailed with the u. Before lengthening, the u has a short quantity. The genitive is commonly sou; in Ionic, seo and seio; in Attic, sethen, according to the analogy of emethen with the redundant e?; and in Doric and Aeolic, seu. The dative is soi, and the accusative se. The nominative and accusative of the dual [forms] are sphōi and sphō; the genitive and dative of the duals are sphōin and sphōn. The nominative of the plural [forms] is hymeis and hymes; and in Doric and Aeolic, ymmemes. From which [is derived] the nominative and accusative of the duals, ymme. The genitive is hymōn [and] hymin. The dative is hymin, sometimes with an acute accent and sometimes with a circumflex.