Abai. Missing letters

Where was the first letter of Abai found? Who could the poet correspond with? To whom he told his ridles?

There are only a handful of found autographs of Abay. A letter from the poet to the Senate. An official letter on several pages. It reveals so much and is worthy of a separate investigation. Manuscript No. 17569, it is also a scientific note “A few words about the origin of Kazakhs.”