I guessed that's what it was but can't see alchemist connection in Chambers. Also the only letter that can come after it is an H...that's not helping my endgame.
We found the quotation in our 1986 ODQ which enabled us to identify all the relevant cells. However our version of OQD did not include the poem's title which we found in another book. That made the endgame very hard work after a relatively gentle gridfill! Really not sure about the poem's content in this day and age.