  Natural 4 zeros texture mass matrices recently proposed by Fritzsch and Xing
have been investigated by including `non-leading'corrections in the context of
latest data regarding m_t^{pole} and V_{CKM} matrix elements. Apart from
accommodating m_t^{pole} in the range 175\pm15 GeV, |V_{cb}| and
|V_{ub}/V_{cb}|=0.08\pm0.02, the analysis with maximal CP-violation predicts
|V_{td}| = .005-.013. Further, the CP-violating phase angle \delta can be
restricted to the ranges (i) 22^o -45^o and (ii) 95^o - 130^o, concretizing the
ambiguity regarding phase of CKM matrix. Furthermore, we find that non-leading
calculations are important when `Cabibbo triangle' is to be linked to unitarity
triangle.
