Joe, me again. I suppose I've answered my own question. Ran Repair from Install disc. Now, Finder seems to be well again. I am able to locate "Corsiva" files. I can also locate ".ttf" files, now. So that appears to end the Finder saga, at least for now.
Thanks again to everyone who contributed, especially Ganbustein.
MacBookPro5,4; 1 Intel Core 2 Duo, 2.53 GHz; 4 GB Memory; 15" Monitor; OS X 10.6.8