These scans are taken directly from the Seed of Isaac pages (part one). To utilise them you probably need to know the area of interest (ie Maughold) and the Seed of Isaac reference (ie MgXXVI) to locate the family of interest. However each tree details the link to the next branch so that you can then look that up too. The updated Tree is probably an easier resource to navigate, but if you want to see the orignal details, look here:
Please note that the copyright of the "Seed of Isaac" and "The MacIsaacs" remains with the family of Rex Kissack and no part may be reproduced from this site without their permission.