From Boris Savinkov’s Memoirs of a Terrorist:
It was a clear sunny day. When I approached the square at the Church of the Intercession [in Petersburg], I saw the following scene. Sazonov, sitting on a bench, was exhaustively and animatedly relating to Sikorsky how and where to sink the bomb. Sazonov was calm and seemed to have completely forgotten about himself. Sikorsky listened to him attentively. Borishansky sat on a bench in the distance, his face imperturbable as usual. Even further away, at the gates of the church, stood Kalyayev who, doffing his cap, crossed himself.
[…]
When I approached 7th Company of the Izmailovsky Regiment Street [currently known as 7th Red Army Street], I saw a policeman on the corner stand at attention. At the same moment, I noticed Sazonov on the bridge over the Obvodny Canal. He walked, as before, with his head held high, carrying the projectile at his shoulder. Immediately, I heard loud trotting behind me, and a carriage pulled by black horses rushed past.
[…]
Suddenly, a heavy, strange, unwieldy sound rent the street’s monotonous hubbub. It was if someone had struck a cast-iron stove with a cast-iron hammer. At the same moment, the broken glass in the windows rattled pitifully. I saw a pillar of grayish yellow, almost black smoke rising from the ground in a narrow funnel. This pillar, ever expanding, flooded the entire street to the height of the fifth floor. It dissipated as quickly as it rose. I thought I saw some black debris amid the smoke.
For the first second, my breath caught in my throat. But I was waiting for an explosion, and so I came to my senses more quickly than the others. I ran kitty-corner down the street to the Warsaw Hotel.
One hundred and eighteen years later.
Source: Aleksandr Ermakov, Facebook, 28 July 2022. Translated by the Russian Reader, since a copy of Joseph Shaplen’s 1931 English translation of Boris Savinkov’s Memoirs of a Terrorist is hard to come by in print and nearly invisible online. I also added the captions to Mr. Ermakov’s snapshots.
On 15 July 1904 [28 July 1904 in the reformed, post-revolutionary calendar], the notoriously oppressive and unpopular Minister of the Interior, Viacheslav Konstantinovich von Plehve stepped into his armored carriage, complete with an entourage of bicycle detectives, and set off from his dacha to the Warsaw Station on his way to regular meeting with Tsar Nicholas II, now residing at his summer palace in Peterhof. Plehve, who had already survived several attacks on his life, probably took this trip in stride, but as he approached his destination, a young man, Egor Sazonov darted towards his carriage and threw a bomb underneath its speeding wheels. Sazonov was just one of several assassins that day who were poised and ready to trade their own lives for the Minister’s. They were members of the Combat Organization (Boevaia Organizatsiia), the terrorist branch of the Socialist Revolutionaries who ultimately murdered a number of prominent political figures, most notably […] Tsar Alexander II.
Source: Visions of Terror
The Russian Reader 