Dave,
Here's a painting by Willem Van de Velde the Elder - from a later period, but the principle is the same:
bmagblog.files.wordpress.com/.../lenoxorhamptoncourt-scaled1000.jpg
You can see how most of the topsail is bundled up into a vertical bundle, with the clews sticking out. Sort of like two letter J's, one of them backwards, stuck together.
Here's another one:
http://www.topofart.com/images/artists/Willem_van_de_Velde_the_Younger/paintings/velde027.jpg
Notice also how thin the furled sail is when it's bundled to the yard.
Here's a good shot of the replica Susan Constant and Godspeed, at Jamestown:
http://www.williamsburgprivatetours.com/wp-content/uploads/2011/04/jamestown.jpg
If you look carefully you can see that the topsails are furled just like the ones in the Van de Velde paintings. And the furled courses are bundled tightly to the yards. (These ship, incidentally, have a couple of rigging features that aren't authentic, and were added in the name of safety: they have jackstays and footropes on their yards, neither of which had been invented at the time of the actual ships.)
One of the most common mistakes among sailing ship modelers is to make the bundles of furled sails too fat. If you're walking up the pier behind one of the Jamestown ships, you'll have trouble seeing that the furled sail is there; the bundle is, if anything, smaller than the yard.
The Jamestown picture shows one big reason why that system of furling was used in those days. Those topsail yards are skinny - so skinny that they might well break under the weight of a man. I've watched the Susan Constant's crew furl the topsails. Two guys standing in the tops can do the job, without going out on the yards.
Since you're getting deeper into the sailing ship world, I'll recommend a book: Seamanship in the Age of Sail, by John Harland. It's a terrific work, showing through contemporary and modern drawings all sorts of details of how rigging works. I think it's out of print, and used copies aren't cheap. (The cheapest one I found in a quick web search is $69.00: http://www.bookfinder.com/search/?ac=sl&st=sl&ref=bf_s2_a1_t1_1&qi=O3S9Uj00u2ftQ4MdesUmVE9Xyzo_3197690279_1:2:7&bq=author%3Djohn%2520harland%26title%3Dseamanship%2520in%2520the%2520age%2520of%2520sail%2520an%2520account%2520of%2520the%2520shiphandling%2520of%2520the%2520sailing%2520man%2Dof%2Dwar%25201600%2D1860%252C%2520based%2520on%2520contemporary%2520sources ). But if you can lay hands on it (maybe through a library) it will be a huge help to model building - and keep you up late at night studying the pictures. Fascinating stuff.
Hope that helps a little.