*KQKn : Tom, the Alsatian dog, jumps from light into shadow to appear as a "spectre of a dog" (758). Dreyer's gardener "moved off with his wheelbarrow, turning with geometrical precision at the intersections of gravel paths, and Tom, rising lazily, proceeded to walk after him like a clockword toy, turning when the gardener turned [...]Two men in top hats, diplomats or undertakers, went by...Out of nowhere came a Red Admiral butterfly, settled on the edge of the table, opened its wings..." (769)

Much later, when the first signs of Martha's deathly pneumonia start to appear, Blavdak Vinomori enters the picture, VN himself, "walnut-brown, "a suntanned fellow", while leaning "against the wall was some kind of net: a bag of pale-bluish gauze on a ring fixed to a rod of light metal" (901). We also find a "split": "a strange rearrangement of emotions was taking place in him (Franz). Dreyer had divided in two. There was the dangerous irksome Dreyer, who walked, spoke, tormented him, guffawed; and there was the second, purely schematic, Dreyer, who had become detached from the first - a stylized playing card, a heraldic design - and it was this that had to be destroyed." (863).

PALE FIRE: "From far below mounted the clink and tinkle of distant masonry work, and a sudden train passed between gardens, and a heraldic butterfly volant en arrière, sable, a bend gules, traversed the stone parapet, and John Shade took a fresh card."  Kinbote, note to line 408....A man, unheedful of the butterfly —/Some neighbor’s gardener, I guess — goes by...Shade, lines 990/999

btw: Matt, besides the trundle exchange, Google-magic revealed a link (these are almost inevitable, considering the amount of retrievable online information) with John Webster's "The Duchess of Malfi"!!! Namely, "Cariola. Duchess's waiting-woman...Her name is a play on the Italian carriolo meaning "trundle-bed", where personal servants would have slept." 

in a discussion at the "pynchon-l-digest" ( August 12, 2003) V2 #3482, two other bonuses: