Yanka Kupala
In the Belarusian community, great interest was vested in this enterprise. The already famous Belarusian poet Yanka Kupala, in his letter to Tarashkyevich, urged him to "hurry with his much-needed work". Tarashkyevich had been working on the preparation of the grammar during 1912–1917, with the help and supervision of Shakhmatov and Karskiy. Tarashkyevich had completed the work by the autumn of 1917, even moving from the tumultuous Petrograd of 1917 to the relative calm of Finland in order to be able to complete it uninterrupted.