The 4 most creative and active years for Simon & Garfunkel, 1966-1969, have now each gotten their own page in this blog. The amount of information I have been able to upload was too much for one page.
So please check the separate pages now for the info you were looking for!

I remember the concert at Marquette University, Milwaukee. Only a few people showed up. The producers were blamed for not doing a very good job. It was a great experience for those of us that showed up. The guys ended up doing a show for us in the Green Room.
I found a poster for two concerts in Chicago in 1967.
http://www.radiotimeline.com/am1000wcfl.htm
Scroll down to middle of the page, you’ll see red background poster
which announces two concerts on July 21&22, 1967 at Civic Opera House.
Here’s a link of the poster.

What was the length of the concerts given by S&G in the 60s?
I’d say 90 minutes. I remember reading a complaint about that the show was short. But in the beginning there wen’t much S&G songs, maybe that’s why they started singing songs by others.
Hello,
I’ve just across an interesting gig:
Friday 7 January 1966 Rockford, IL Sherwood Lodge (A Thumb Productions show with the Shadows of Knight.) Citation: Rockford Register Fri 7 Jan, pB12.