Mehrmah Khanum Ismat al-Saltaneh

[2] During the final years of Mohammad Shah's reign, he held Farhad Mirza in high esteem.

[3] In her youth, Mehrmah Khanum married Mirza Mohammad Qavam al-Dawla, who was several years older than her.

[4] After Qavam al-Dowleh's death in 1873, Mehrmah Khanum married his cousin, Mirza Musa Vazir-Lashkar Ashtiani.

[1] In 1879-1880, she embarked on a pilgrimage to Mecca, which lasted ten months, and her travelogue, Safarnameh-ye Ismat al-Saltaneh, is a creation of this journey.

This suggests that she married Abd al-Wahhab Khan Nasir al-Dowleh a few months after the passing of Mirza Musa.