Where was the literature quiz held?

From the text:

It’s the program for this year’s Grahamstown Schools Festival. It has given me what I was looking for . . . an opportunity to fight the lunacy. The Standard Bank is sponsoring a new event: an interschool English literature quiz. Each team to consist of two members. I’ll come straight to the point. I have suggested to Miss Brockway that Zolile High and Camdeboo High join forces and enter a combined team.