Specialist in military engineering. General. Professor at the Academy of Engineering, Petersburg. Member of the Mighty Handful.
One of the most distinguished music critics in the 1860-1890s. Finished the opera Kamennyi Gost’ by Dargomyzhskii, 1866. Among the composers who put the finishing touches to M. Mussorgskii’s opera Sorochinskaia Iarmarka.