During my 2007 trip to California. I found a 16 MB XD memory card during my visit to Yosemite Park. Today I purchased a digital camera that uses XD memory and was able to finally view the photos on the card. Some interesting shots from San Francisco were on this memory card. Of interest are some good shots of one of the surviving cable car lines. Plus the turntable. Which they use to turn the cable-car in the opposite direction. Also a good shot of the "Golden Gate Bridge".
It was rare that I found this XD memory card, and have kept it safe all of these years. The photographer of these photos will remain unknown.