The de Brett family tree - Calligraphy by Alistair Parry.
An Adobe Acrobat file can be downloaded. This allows you to zoom in and see details of the tree.
Select the link below. This will open the Acrobat file in a new window. Click the the + button to get a magnification of 150% - I found this gave the best view. Right click the mouse button and select the hand tool. This allows you to move around the tree as required.