Siyyid Yahyá had been himself desirous of obtaining first-hand knowledge of the claims of the Báb, but had been unable, owing to adverse circumstances, to undertake the journey to Fárs. The message of Muhammad Sháh decided him to carry out his long-cherished intention. Assuring his sovereign of his readiness to comply with his wish, he immediately set out for Shíráz.
On his way, he conceived the various questions which he thought he would submit to the Báb. Upon the replies which the latter gave to these questions would, in his view, depend the truth and validity of His mission.
(Chapter 9, ‘The Dawn-Breakers’)