Canon Avis was also Master of Ceremonies for the Pontifical Low Mass, in Kansas City, of His Excellency Bishop Robert Finn on September 14, 2007, the effective date of the motu proprio Summorum Pontificum. I remember greeting him that day by addressing him as "Monsignor". Luckily, he got the joke, but probably thought I was indiscreet.
As a bonus, here is another picture of Canon Avis with another good Bishop, Archbishop Raymond Burke. This photo was taken on the day of Canon Avis' priestly ordination in St. Louis, and he is imparting to His Grace his priestly blessing.