The prophet Calchas correctly determines the source of the troubles but will not speak unless Achilles vows to protect him.
ðə pɹˈɑːfɪt kˈæltʃəz kɚɹˈɛktli dɪtˈɜːmɪnz ðə sˈoːɹs ʌvðə tɹˈʌbəlz bˌʌt wɪl nˌɑːt spˈiːk ʌnlˈɛs ɐkˈɪliːz vˈaʊz tə pɹətˈɛkt hˌɪm.