cover Denver, Colorado, two covers: one bearing no. 65 tied by indistinct strike of 1863 Denver City, C.T. c.d.s. with second strike alongside; other bearing no. 158 tied by negative 'M' in double rectangle fancy cancel on orange cover, indistinct May 19 (1875) Denver, Colorado c.d.s., few trivial imperfections, both covers appear fine, the negative 'M' was only used from Feb. 3 to July 10, 1875est.