A well-known theorem of Z. Nehari shows how one can locate the singular points of a functionf(z) given bywherepn(z) is the Legendre polynomial of degreen, by relating them to the singular points of the associated functiong(w) given by. This theorem was later generalized by R. Gilbert to the case where, where Cλn(Z) is the ultraspherical polynomial of degreen. In this paper we show a connection between the theory of generalized Faber expansions and the work of Gilbert and Nehari. In fact, we derive theorem for the generalized Faber expansions from which both Nehar' results follow as special cases.