[Richard Hargreaves]

The principal source is a speech von Cochenhausen, 10 ID CO, gave six weeks later (the original is in BA-MA RH26-10/544)

...Around 0900 hours [on September 24th 1939], 41 Infanterie Regiment attacked. Under the cover of strong artillery fire, it quickly approached Mokotow and reached the church at Krolikernia at 1000 Hours. At that moment, Hitler appeared in front of our artillery on the racetrack at Mokotow, not far behind the enemy; he was visiting the division for the second time.
The divisional commander took him to the 50m-high race track tower, informed him of the situation, and showed him Fort Mokotow, identifiable with the naked eye, and the infantry attacking on the southern outskirts of Mokotow. The sight of the burning city from up here was powerful and moving. Despite it being a clear Sunday, it appeared as if the sky bore a fierce storm. Huge fires smouldered in the city; the rising smoke continually darkened the heavens. German aircraft continued their journeys above the clouds of smoke; one pushed through the layer of smoke in a dive and the loud crash of the heavy 50kg bombs mingled with the continuous roar of shells landing, fired in from all sides by German artillery. An unforgettable scene, which also made the deepest impression upon Hitler.