Here is a neat Ambler-related item we found for sale on the Everything But the House website:

From the same website:

An original 1967 lithographic poster designed by extremely well-known American graphic designer Milton Glaser (born 1929) for the Ambler Music Festival. The poster was published by and the festival was held at Temple University in Philadelphia, Pennsylvania. The poster features a large treble clef that fades into a bright flower blossom and is pictured in a playfully illustrative style. The artist’s name is printed in-plate to the upper right, and the Temple University logo is printed to the lower left. Publishing information is printed to the lower right. The poster is presented without matting or framing.

We think that the festival was probably at Temple Ambler. Did any of our readers attend this event? We couldn’t find anything on the internet about it but would welcome first-hand accounts.