Consider this passage from Smiley’s People (John Le Carré, 1990):
On top of the food-store lay a parcel of Gauloises Caporal cigarettes, Vladimir’s favourites when he couldn’t get his Russians. Tipped, he noticed, reading the different legends.
What’s the subject of this “tipped”? Is it “he”? So it can also be put as “he tipped, he noticed”?