But winds of dissension were already blow ing, and rifts were making their mark. Whilst bound in chains in the Siyáh-Chál of Tihràn, at a time when Mirza Yahya [half-brother of Bahá’u’lláh] was constantly running for shelter, Bahá’u’lláh had vowed to arise and regenerate the shattered community of the Báb. Now, from the obscurity he had chosen, Mirzá Yahyá was secretly engaged in engineering opposition to Bahá’u’lláh, in company with Siyyid Muhammad-i-Isfahání, who had established himself in Karbilá.
- Hasan Balyuzi (‘Bahá’u’lláh King of Glory’)