another first

A question related to the earlier post on the first importance sampling in print, about the fist Markov chain Monte Carlo in print. Again uncovered by Charly, a 1973 Chemical Physics paper by Patey and Valleau, the latter inventing umbrella sampling with Torrie at about the same time. (In a 1972 paper in the same journal with Card, Valleau uses Metropolis Monte Carlo. While Hastings, also at the University of Toronto uses Markov chain sampling.)