Account of Baha attempting to poison Subh-i-Azal from Azali source

The Hasht Bihisht (p. 304-305) gives the account of Baha attempting to poison Subh-i-Azal as follows:

"The first juggle and trick of sorcery which he [i.e. Baha] outlined was this, that he brought to Hazrat-i Azal [i.e. Subh-i Azal] a dish of plain food, with one side of which he had mixed with some poison, intending to poison His Holiness. For hitherto the apportioned breakfast and supper of His Holiness the Fruit [Hazrat-i Thamara, one of the titles conferred on Subh-i Azal by the Point] had been from the house of Mirza Husayn Ali [i.e. Baha]. When that poisoned dish was placed before His Holiness, Mirza Husayn Ali pressed him to partake of it. By a fortunate chance the smell of onions was perceptible in the food, and His Holiness, being averse to taste it. Mirza Husayn Ali continued to press him urgently to eat. He replied, “it smells of onions, I will not eat it; if it is so good, eat it yourself." From this answer Mirza Husayn Ali supposed that His Holiness had divined his evil design, and, simply put the view of disguising the truth and putting a better appearance on the matter, ate a little from the other side [i.e. the unpoisoned side] of the dish, in order that the suspicion of His Holiness might perhaps be dispelled and he might eat the poisoned side. But His Holiness, because of the smell of onion would not eat"