Homerica: a conspectus of key forms

Ι) Data on the forms of the dative plural of ἔπος is not presented by LSJ s.v. (but some etymological comment is at the head of the entry, not at the foot, with the dialect forms: older Ϝέπος SIG9 (v. infr.), etc., εος, τό (Skt. vácas 'word', 'hymn', cf. εἶπον): ):

a) ἔπεσσι Od.19.214 (-ν); ἔπ- τε μειλίχοισι# Il.9.113, Od.9.258 (-ν), 363, and 376, and 19.415; cf. Hes.Op.186 χαλεποῖς βάζοντες ἔπ-#; also Pi.O.13.25.

b) ἔπεσιν Il.1.77.

c) ἐπέεσσιν# Il.1.223 (ἀταρτητοῖς ἐπ-), 304 (ἀντιβίοισι μαχεσσαμένω ἐπ-); cf. 6.325 and 337 (αἰσχροῖς ἐπ-#), without and then with -ν.

ΙΙ) The endings ᾱο and εω:
Il.21.84-86: μινυνθάδιον δέ με μήτηρ | γείνατο Λαοθόη, θυγάτηρ Ἄλτᾱο γέροντος, | Ἄλτεω, ὅς Λελέγεσσι φιλοπτολεμοισι ἀνάσσει, |

The original 'Aeolic' Ἄλτᾱο and the latest Ionic Ἄλτεω (a spondee by synizesis) a:-stem masculine genitive singular forms are found in adjacent lines. Sappho and Alcaeus would use Ἄλτᾱ. In this instance, line 86 could be omitted without damage to syntax or to sense.

III) Diectasis:
ὁράω (of which there are no uncontracted forms in Hom., e.g. *ὁράεις, cf. Il.21.108. cited below) - ὁρῶ Il.3.324 (also ὁρᾷς, ὁρᾷ, ὅρα, ὁρᾶν, ὁρῶν, ὁρῶμαι, ὁρᾶται, ὁρᾶσθαι, ὁρώμενος), ὁρόω Il.5.224 (ὁράᾳς Il.21.108, ὁράασθαι Od.20.317, ὁρόωνὁρόων Il.1.350, 3.325, Od.8.314, ὁρόωντες Il.24.633, Od.7.145, 9. 295, and 20.373, ὁρόωσα Od.19.514, 2pl. opt. ὁρόῳτε Il.4.347). Contrast Ionic ὁρέω Hdt.1.80 and the dialectal 3rd person plural ὁρεῦντι in Theocritus 9.36.

IV) The second person singular of 'be':   
ἐσσί Il.1.176, 280, 3.164, 172, etc.: Od.1.175, 297, etc.
εἶς (εἴς) Il.16.515, 24.407; of the 9 instances of this form, only 1 cannot be altered to ἐσσ(ί) because it is not pre-vocalic, namely Od.17.388: ἀλλ’ αἰεὶ χαλεπὸς περὶ πάντων εἰς μνηστήρων.
εἰς Il.16.538, 19.217, etc.: Od.1.170, 207, 4.371, 611, etc.
εἶ is, it seems, not found, nor ἐσί (citable from Cretan GDI 4959a).