At the time, he attributed his light-headedness to the effects of heat and humidity, but later realised that it was carbon monoxide fumes from the paraffin heater.
æt ðə tˈaɪm, hiː ɐtɹˈɪbjuːɾᵻd hɪz lˈaɪthˈɛdᵻdnəs tə ðɪ ɪfˈɛkts ʌv hˈiːt ænd hjuːmˈɪdᵻɾi, bˌʌt lˈeɪɾɚ ɹˈiːəlaɪzd ðˌɐɾɪt wʌz kˈɑːɹbən mʌnˈɑːksaɪd fjˈuːmz fɹʌmðə pˈæɹəfˌɪn hˈiːɾɚ.