For ἐγκεχειρῆσθαι, the reading of all the printed Editions, which hardly yields a suitable sense, we should probably substitute ἐγκεχειρίσθαι.  A similar confusion of the two verbs occurs in Polybius (Hist. VIII. xviii. 6); the proper use of the latter is seen in Joh. Damasc. (De Fide Orthod. II. 4, quoted by Cleopas), who speaks of Satan as being “of these Angelic powers the chief of the earthly order, and entrusted by God with the guardianship of the earth” (τῆς γῆς τὴν φυλακὴν ἐγχειρισθεὶς παρὰ Θεοῦ).