The story of Mírzá Abú’l-Hasan Afnán's suicide & Abdul Baha's knowledge of the unseen.
An eminent personage of the Afnán of the Divine Lote-Tree [the family of the Báb], whose name was Mírzá Abú’l-Hasan, was a resident of Haifa. He was deeply pious, humble and unassuming, and the object of attention and bounties of ‘Abdu’l-Bahá. He had a wife who was also an Afnán. One day when she was attending to her duties in the kitchen, suddenly the flames engulfed her and caused her death. The honored Mírzá Abú’l-Hasan was profoundly heartbroken and depressed over this horrendous incident. Therefore, ‘Abdu’l-Bahá had whispered to him, “I, too, will leave soon.”
After hearing this utterance, he was bereft of patience. Next morning, after attending to necessary tasks and the purchase of daily provisions for his household – which had been one of his duties – he set out at an early hour for the seashore. After discarding his clothing and placing his green turban, which was his ancestral emblem, over them, he threw himself into the surging sea.
When this news reached His blessed Person [‘Abdu’l-Bahá], He instructed that certain sea-experienced souls immediately retrieve his remains from the grasp of the strong waves. [When he was later examined, it was discovered that] the fish had only eaten away one of his eyes.
Thereupon, the funeral of his earthly remains was conducted with utmost tribute and dignity in the blessed presence of ‘Abdu’l-Bahá.
Ref. : With ‘Abdu’l-Bahá - Reminiscences of Khalil Shahídí, translated by Ahang Rabbani, Page 84,85