Named for Dolly Varden, a character known for her colorful costume in the novel Barnaby Rudge by Charles Dickens, this cake is a riot of lively flavors. You might want to do the baking the day before and assemble later. When I made this cake, I found that four layers was almost too much and feel like a two-layer cake (one layer of each) is more practical for everyday. Wrapped tightly in aluminum foil, the extra layers freeze nicely for future use. Dried cherries would be an excellent sub for the maraschino cherries, if desired.