Thanks all!
Duck, there is an oak "plug" about 1/4" thick under the tile (about 3/8" thick). I push in the tile (tight fit) until it is flush w/top. Some caulking on the tile bottom to keep water out and have it stick to the oak plug.
The plug is then pushed in and two brass pins are toe nailed into the side to keep in in.
John, yep. I have no room for stuff so it all goes for sale eventually. I like making bigger stuff, get a chance to use up some wood!