A little under two years had passed since Bahá'u'lláh's
confinement in the barracks, when suddenly a most tragic event occurred. It was
the untimely death of Mirza Mihdi, entitled the Purest Branch, the younger
brother of 'Abdu'l-Bahá, who was fatally wounded when he fell from the roof of
the barracks.
In 1848, at a time when the followers of the Báb were
engulfed by sufferings and persecutions, a son had been born in Tihran to
Bahá'u'lláh and His illustrious wife Asiyih Khanum, entitled Navvab. He was four
years younger than 'Abdu'l-Bahá and was given the name 'Mihdi', after a brother
of Bahá'u'lláh who was dear to Him and had died a year before. Later the Pen of
the Most High bestowed upon this son the title 'Ghusnu'llahu'l-Athar' (The
Purest Branch).
Unlike 'Abdu'l-Bahá, Mirza Mihdi could not remember much of
a life of luxury in Tihran, for when he was just over four years of age His
father had been imprisoned in the Siyah-Chal, and all His possessions plundered
and seized by the enemies of the Cause. During the four months that Bahá'u'lláh
lay in that horrible dungeon, the Holy Family spent their days in anguish and
fear, not knowing what would happen to Him. Often frightened and anxious, this
child, tender in age and delicate by nature, found his only shelter and refuge
within the arms of a loving and devoted mother. But Providence deprived him of
this also. As the journey to Baghdad, undertaken in the severe cold of the
winter, was laden with hardships and dangers unbearable for a child as delicate
as Mirza Mihdi, he had to be left behind in Tihran in the care of relatives.
For about seven years he tasted the agony and heartbreak of separation from his
beloved parents.






