fɹʌmðə diːtˈeɪld dᵻskɹˈɪpʃənz ʌv təpˈɑːɡɹəfi, ðɪ ˌɪnfɚmˈeɪʃən ɐbˌaʊt ðə wˈɛðɚ, ænd ðə nˈʌmbɚz ʌv kˈæʒuːəlɾiz ɹᵻkˈoːɹdᵻd ˈiːvən wɛn vˈɛɹi smˈɔːl, ɪɾ ɪz klˈɪɹ ðæt hiː wʌz ˈɔːlsoʊ ɐn ˈaɪwˈɪtnəs tə ðɪ ᵻvˈɛnts dᵻskɹˈaɪbd.
From the detailed descriptions of topography, the information about the weather, and the numbers of casualties recorded even when very small, it is clear that he was also an eye-witness to the events described.