This article analyses The Concise History of Right-Speech Singing (1832), a previously unknown essay by Makar Yakovlev, written in the centre of the Fedoseevtsy denomination of the Bespopovtsy Old Believers, i.e. at the Preobrazhenskoye cemetery in Moscow a few years after the dissent of metropolitan Monin’s community of the Bespopovtsy of the Pomortsy denomination over church singing practice. The purpose of the study is to criticise and analyse the source in the context of the events which led to its creation. The author employs several methods of archaeography, examining the paper, handwriting, design, and structure of the text. The arguments given in it in defence of the practice of right-speech singing are compared with the arguments of other polemical works of the Old Believers on the same topic. The author establishes a circle of persons associated with the origin of the essay analysed, except for Makar Yakovlev himself, making several suppositions about him. It is noted that the essay was supposed to be copied. The article clarifies the time frames for the creation of the text On the Words of Church Singing by Andreian Sergeev, one of the leaders of the dissent of the Monin community, and the reliability of the message of the pre-revolutionary researcher N. I. Popov about the role of the Fedoseevtsy community of the Preobrazhenskoye cemetery’s choir in organizing church singing for the Bespopovtsy of that time. It is noted what kind of arguments the essay introduces into the dispute about right-speech singing, and that they are mostly based on rumours proving the ancient character of this practice, which is how they differ from the usual arguments of the advocates of “right speech”, based on the analysis of language. The author concludes that the source is interesting for clarifying the process of work on the transfer of Ivan Anisimov’s community, which the dissenters joined, to right-speech singing.