Title: Taḥqīq dar bārah-'i rūz-i arba'īn-i Hazrat Sayyid al Shuhadā'
Description: Study of early Islamic history, with special reference to the martyrdom of Ḥusayn ibn 'Alī at Karbala, Iraq, in 680, and the 40-day mourning observed by the Shiites anually to commemorate that event.