This paper presents an array of novel data attested in Sinhala (Sinhalese). which indicates that Subjacency is a viable constraint even on LF Wh raising. It is shown that a satisfactory characterization of the LF Wh movement phenomena must include a system of pied piping, and that the presently available solutions are unable to offer a well-motivated account for the pied piping phenomena. It is then argued that the relevant phenomena are adeequately handled only by reference to machinery of pied piping defined by a quantificational domain marker.