Nights reciting the Qur'an in the river, and a grave the Ravi twice claimed
Latif's 1892 history places him by a follower's own account: "According to Pir Mahomed, author of the Haqiqat-ul-Fuqara, Lal Husain flourished in the time of Akbar" (Latif, p.145) — a hagiographer's claim, recorded here as his claim. The same chapter records what devotees said he did: "Many stories are told of the miracles performed by Lal Husain. It is said he spent his nights in repeating the Koran by heart in a standing posture in the Ravi" (Latif, p.145).
The dates the book gives as fact, not legend, are precise: "He died in 1008 A.H. (1599 A.D.), and was buried at Shahdara. A few years after, as predicted by the saint, the grave was swept away by the overflow of the Ravi. Madho exhumed the corpse, and, with due formalities, buried it in the present locality" (Latif, p.145) — the shrine north of Baghbanpura, near the Shalimar Gardens, that still stands.
A prince's diarist, and a fair that outlived the saint
Latif reports a courtly witness to the saint's own reputation: "Dara Shekoh, in his learned work, known as Shathiat-i-Dara, writing of Lal Husain, says that Prince Salem and the ladies of Akbar's harem believed in his supernatural powers and entertained great respect for him" (Latif, p.146), enough that Salem "had specially appointed an official of the Court, named Bahar Khan, to keep a diary of the saint's proceedings."
What survived him at the shrine outgrew the saint himself: "Two great fairs of Lahore, called the Basant and Chiraghan, are annually held at this shrine," and under Ranjit Singh's rule the Maharaja himself, "when paying his respects to the shrine, made an offer of Rs. 1,100 and a pair of shawls of yellow colour" (Latif, p.146). His own voice survives too, in a kafi to Madho: "Madho Lal! Piyaare ki parwaasa dam da?" — "Madhu Lal! My dear what is this trust on life?" (Wikipedia, "Shah Hussain").