From 11:00PM PDT on Friday, July 1 until 5:00AM PDT on Saturday, July 2, the Shmoop engineering elves will be making tweaks and improvements to the site. That means Shmoop will be unavailable for use during that time. Thanks for your patience!
"Tom Swift and his Electric Lion" (101) is a reference to the Tom Swift books. Tom Swift (or Tom Swift, Jr.) was a young inventor who made fabulous inventions that allowed him to have all sorts of adventures. Most of the books had titles like "Tom Swift and the ____," but there was never an electric lion. The book series began in 1910.
"Rima" (115, 141) is a wild girl of the jungle in the novel Green Mansions by W. H. Hudson (1904).