λύπης ἰατρός ἐστιν ἀνθρώποις λόγος → for men reason cures grief, for men reason is a healer of grief, a physician for grief is to people a word, pain's healer is a word to man, logos is a healer of man's anguish, talking through one's grief is therapeutic
vestīgātĭo: ōnis, f. vestigo,
I a tracing or searching after (post-class.): Psyche dies noctesque mariti vestigationibus inquieta, App. M. 6, p. 173.
vestīgātĭō, ōnis, f. (vestigo), action de chercher [qqn], recherche : Apul. M. 6, 1.