Detailed instructions for working a group puzzle of type 'Percival'

This is a signature puzzle named 'Percival'

The 8 elements in each group of this type of puzzle are: P, E, R, C, I, V, A, and L.

Every group in the puzzle must contain exactly this set of elements.

Each row is a group numbered as shown in this Percival figure.

In a Percival puzzle, each row is a group numbered as shown in the figure above.

Each column is a group numbered as shown in this Percival figure.

In a Percival puzzle, each column is a group numbered as shown in the figure above.

Each 4x2 rectangle is a group numbered as shown in this Percival figure.

In a Percival puzzle, each 4x2 rectangle is a group numbered as shown in the figure above.