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Using your Discipline, you focus your attention on the strange triangular plaque fixed to the bars and, gradually, its purpose becomes clear. By finding the total number of triangles contained in the design and turning the pointer to the same number on the dial before pulling the lever, you will ensure that the portcullis opens safely.

Turn back to 11 and study the design. When you think you have the answer, turn to the entry that bears the same number.10

[10] To turn to the section of your choice, there are several methods. One is to turn to the Table of Contents and choose the appropriate section from the list.

If you have chosen the correct answer, a footnote in that section will tell you so.

Text copyright © 1986 Joe Dever.
Illustrations copyright © 1986 Gary Chalk.