The present study contrasts two subcorpora of the Corpus of Earlier African American English , one consisting of
letters and one of transcribed speech with a view to determining the relative non-standardness of the language in both subcorpora. By using
the set of features laid out in the Mouton World Atlas of Variation in English (WAVE; Kortmann and Lunkenheimer 2012 ) the attestations and their relative frequency in both subcorpora were determined and scrutinised. The
analysis shows that letters are relatively more standard in their language than transcribed speech and this is assumed to be due to letter
writers awareness of non-standard structures in vernacular speech and avoid them in written language.