Most opera singers come to the profession through fairly well defined pathways; music degree, post graduate degree or conservatory training, young artists program, and so on. Occasionally one comes across someone with a very different background. The English (well Scouse) mezzo Jennifer Johnston read law and practiced at the bar before becoming a professional singer. Burkhard Fritz studied medicine before committing to singing. Yesterday Mexican-American tenor Joshua Guerrero, in town to sing the Duke of Mantua, used his lunchtime recital in the RBA to tell us his story in words and music.