The photo was shown with a combination of a href= and img src= HTML clauses.
The values to show the photo are pulled from the Share... Get a link... page in SmugMug. Position on the photo you want to use, then click Share... Get a link. For the a href= value, select the Lightbox URL from the Gallery Links tab. For the img src= value, select one of the links from the Photo Links tab.
Here's a sample of the HTML, with spaces inserted in the html to prevent blogger from running the html as opposed to showing the code:
< a href="http://www.denisegoldberg.com/Travel/Autumn-Acadia/14428659_DMtEp#1071547228_u4FwF-A-LB" >If you use this HTML as an example, be sure to remove the spaces.
< img src="http://www.denisegoldberg.com/Travel/Autumn-Acadia/2010107D3016L/1071547228_u4FwF-M.jpg"/ >
< /a >