The “Letters of the Living”: – Other than Tahirih, they “attained the presence of the Báb, and were personally invested by Him with the distinction of this rank"

As to those whose supreme privilege it was to be enrolled by the Báb in the Book of His Revelation as His chosen Letters of the Living, their names are as follows:

Mullá Husayn-i-Bushrú’í,

Muhammad-Hasan, his brother,

Muhammad-Báqir, his nephew, Mullá ‘Alíy-i-Bastamí,

Mullá Khudá-Bakhsh-i-Quchání, later named Mullá ‘Alí

Mullá Ḥasan-i-Bajistání,

Siyyid Husayn-i-Yazdí,

Mírzá Muhammad Rawdih-Khán-i-Yazdí,

Sa’íd-i-Hindí,

Mullá Mahmúd-i-Khú’í,

Mullá Jalíl-i-Urúmí,

Mullá Ahmad-i-Ibdal-i-Marághi’í,

Mullá Báqir-i-Tabrízí,

Mullá Yusif-i-Ardibílí,

Mírzá Hádí, son of Mullá ‘Abdu’l-Vahháb-i-Qazvíní,

Mírzá Muhammad-‘Alíy-i-Qazvíní. 

Táhirih, 

Quddús.

These all, with the single exception of Táhirih, attained the presence of the Báb, and were personally invested by Him with the distinction of this rank. 
(Chapter 3, ‘The Dawn-Breakers’)