Γλῶσσα Ἔαγε is the literary reading accompanying the sixth erratum, written under the Johannes Sigil heteronym.
Sappho 31 breaks its metre at two points, and the manuscript is damaged at both. At line 9 the poem says the tongue has broken — γλῶσσα ἔαγε — and a hiatus between the two words makes the reader's own mouth perform the gag. Nagy reads that break as intended; the tradition admires it, while obelizing the words beside it and generating three separate papers by Bonanno on two syllables. At line 17 the poem says all is to be dared and the metre breaks again — and the identical phenomenon is filed as corruption.
The essay's argument is that the difference between those verdicts is not evidence but completeness. We possess the whole of line 9, so its rupture reads as control; line 17 stops mid-clause, so its rupture reads as accident. The tradition admires a break it can see the far side of and pathologizes one it cannot — because an editor who calls a disruption corrupt has work to do, and one who calls it deliberate has only to stop.
Both lines name an act and hand its performance to the reader. ἔαγε is a finite verb with its subject expressed and the rupture is in the sound. τολματόν is a verbal adjective in -τός that cannot govern a nominative agent — the rupture is in the agency, and what fills it is whoever reads. Once in the mouth, once in the hand.
The dialect count is reported with its insufficiency carried in the accompanying erratum. The essay makes no attribution claim.