January 27 at the Black River took place by Pushkin and d'Anthès, as a
result of which Pushkin was killed. There was a conspiracy around the
poet’s family, into which even his friends were drawn. Having learned
about the contents of anonymous letters discrediting the name of Natalya
Pushkina, the emperor saw in them slander against his family, and he
instructs the head of the gendarmes of the secret search office Dubelt
to figure this out.