There's a fascinating article about Toledo's Bishop Schrembs ministering to the deaf community of Toledo in 1917; click HERE. A representative of the St. John Institute for Deaf-Mutes in Milwaukee, Wisconsin, met with the bishop and priests from St. John's University downtown. And Traffic Officer Malcolm O'Sullivan helped too!
From reading the article, I believe that the back row of people in the photo above were deaf Catholics who had been confirmed by Bishop Schrembs. Also, second from the right in the first row is Mgr. A. J. Schwertner, who was later Bishop of Wichita.