Macquer gave him (the alchemist noted in OP article) formal credit in his textbook, writing that “the phosphorus here described was first discovered by a citizen of Hamburgh named Brandt, who worked upon urine in search of the Philosopher’s stone.” [1]
Of course i found this hilarious, but its a prime example of serendipity. [2]
[1] https://www.sciencehistory.org/stories/magazine/hennig-brand...