This paper discusses the graphic system of manuscripts by Konstantin Rychkov (ca. 1910) containing texts in several dialects of Evenki (Tungusic) with Russian translation. The letters г and h arguably denote voiced velars or post-velars, stops and fricatives alike. The former is only used before front vowels, the latter otherwise. The letter h is also found quite often in place of the velar nasal. Palatalization is denoted by three means: a dedicated diacritic after the consonant, an umlaut on the vowel, or the vowel i/ы alternation. Russian letters for hissing sibilants were substituted with Latin ones by Rychkov, which might reflect a different (“lisping”) pronounciation. A special diacritic under sibilants and б probably indicates semi-voicing.