Mírzá Muhammad Hasan Bushrú’í was the younger brother of Mullá Husayn. He was the second Letter of the Living. He accompanied Mullá Husayn on his travels.
He became badly wounded in the same battle at Shaykh Tabarsí in which Mullá Husayn was killed; according to some accounts, then served as leader of the Bábí forces and was subsequently killed at Shaykh Tabarsí.
“Mírzá Muhammad Hasan Bushrú’í” Bahá’í Encyclopedia Project. baha’i-encyclopedia-project.org
Baha’i World Centre Archives – Door to the House of the Báb