hiː hæd fˈɔːlən ˈɪl fɹʌm ɐ fˈɔːɹm ʌv ˈæltɪtˌuːd sˈɪknəs, pɹˈɑːbəbli sɚɹˈiːbɹəl ˈɛdᵻmə, ðæt kˈɔːzd hˌɪm tə hɐlˈuːsᵻnˌeɪt ænd bɪkˌʌm kənfjˈuːzd.
He had fallen ill from a form of altitude sickness, probably cerebral edema, that caused him to hallucinate and become confused.