Roberts added that although early draft of "The Shakespeare Code" contained "a sly reference to "City of Death"", it was removed because "it was so sly it would have been a bit confusing for fans that recognised it and baffled the bejesus out of everyone else." The name of the Carrionites derives from screenwriter Gareth Roberts' own New Adventures novel, "Zamper" (1995), which refers to a slug-like race known as "arrionites". Roberts has said, "I always thought it was a nice word, and I was thinking of the witches as carrion creatures, so I bunged a C in front of it". In the Lost Adventure by Douglas Adams "Shada", there is a passing reference to a Time Lord, Scintilla, who was imprisoned for 'conspiring with Carrionites.' There are several references to races from earlier "Doctor Who" episodes. At one point, the Doctor uses the title "Sir Doctor of TARDIS," which had been awarded to him by Queen Victoria in "Tooth and Claw" (2006). The Carrionites' contribution to "Love's Labour's Won" includes a reference to "Dravidian shores"; a "Dravidians starship" is mentioned in "The Brain of Morbius" (1976). Lilith refers to the Eternals, a race introduced in the original series serial "Enlightenment" (1983). In addition, the Doctor finds a skull in Shakespeare's prop store that reminds him of the Sycorax race from "The Christmas Invasion" (2005); when the Doctor mentions the name "Sycorax" to Shakespeare, Shakespeare says that he will use the name (the joke is that the name in fact derives from Caliban's mother in Shakespeare's play "The Tempest".) Other sequences include subtle references to much earlier episodes. One of the putative lines of "Love's Labour's Won", "the eye should have contentment where it rests", is taken from episode three of the 1965 serial "The Crusade" — a story consciously written in Shakespearean style. The episode concerns the "lost" Shakespeare play "Love's Labour's Won", which is referred to in more than one historical document, but which may be just an alternative title for an extant play. Historically, a reference to "Love's Labour's Won" (in Francis Meres's "Palladis Tamia, Wits Treasury", 1598) predates the construction of the Globe Theatre (1599).