[*] 2996. ὡς often indicates the thought or the assertion of the subject of the principal verb or of some other person prominent in the sentence. Here ὡς expresses a real intention or an avowed plea. So often with participles (2086); and also with the prepositions εἰς, ἐπί, πρός; as ““ἀπέπλεον . . . ἐκ τῆς Σικελία_ς ὡς ἐς τὰ_ς Ἀθήνα_ς” they sailed away from Sicily as though bound for Athens” T. 6.61.

http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.04.0007:smythp=2996

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Herbert Weir Smyth, A Greek Grammar for Colleges, chapter 2996