(1) History of Different Slavic Peoples by J. Rajic (1823)
(2) Bulgarian History by Chrysanth of Dupnitsa (1844)
I'd classify both as Church Slavonic. However, the former seems to be influenced by Russian, and the latter has typical Bulgarian grammatical features similar to those of Modern Greek («за да видите вы» = «για να δείτε εσείς») though retaining all nominal inflection mostly lost in Standard Modern Bulgarian.
Am I right, or is it somewhat more complicated? Thank you in advance.