It's quite a time since I visited Ian Boyle's Simplon Website and when I did last evening...what a TREAT! He's done a fantastic job updating it and it provides a masterful online reference. If you want a totally enjoyable couple of hours, grab a cup of coffee, (or that strange brew our "dan undahs" drink), and surf through some lovely images.
http://www.simplonpc.co.uk/CGN.htmlCheck out the very early paddlers on Page 1 - Paddle Steamers 1822-1886 for modeling inspiration.
Here's one of my favourites
http://www.simplonpc.co.uk/CGN/Leman2-01.jpgPJ
Victoria BC Canada