The tied-up curtain in the foreground creates the impression that the viewer is looking at an intensely private, personal scene. There is also an element of trompe l'oeil as Dutch paintings were often hung with little curtains to conserve them, and the device of painted curtains is seen in other Dutch works of the period. The diagonals on the chequered floor create the impression of depth and three-dimensionality. The fact that it is a love letter that the woman has received is made clear by the fact that she is carrying a lute (more specifically, a cittern, a member of the lute/guitar family). The lute was a symbol of love - often carnal love; luit was also a slang term for vagina.