Each tract is shown in two parts: the outer and then the inner cover. Click on the left arrow below to go back to a choice of categories.
Instructions for use
Place the mouse pointer over any picture - without clicking - to see it full size in the centre of the screen.
Click on any picture to bring up a white dialogue box with options to run through all the choices, either individually (by clicking the left or right arrow) or by pressing the "play" button to run the whole sequence of pictures on this page and any additional pages. When you've finished, close the dialogue box by clicking on the screen outside the box.