My first entry in this blog, six weeks ago to the day, was a news flash that Sonny Rollins, the greatest living improviser in jazz, will play at Carnegie Hall on Sept. 18 in a trio with the monumental drummer Roy Haynes and the agile bassist Christian McBride—a one-night stand that no jazz fan could stand missing.

I now hear that the tickets will go on sale this Monday, at Carnegie’s website, over the phone (212-247-7800), or at its box office (57th St. & 7th Avenue). They are likely to sell out quickly.