Here's another post from Vikingsword, a 4-page topic with dozens of photos of all kinds of extremely rare early smoothbore cannon projectiles, some of which I've never seen before. When I see a post of this kind, I roll thru and "save as" every photo in it, to my computer, because the web page may be gone tomorrow. You can also simply save the entire webpage as an html file on your computer, and the images will all be there, with text. You just have to remember to save each of the separate pages, the computer won't know that there's more than one page when you save it this way.
There's no book I've seen that has even 10% of the wonderful stuff pictured in those 4 pages.
http://www.vikingsword.com/vb/showthread.php?t=8012&page=1&pp=30&highlight=grape+shot