Mean orbital light curves
of T CrB at quiescence are derived from previously unreduced 1872-1904 visual
estimates of T. W. Backhouse and partly concurrent Harvard photographic
observations. They agree in showing ellipsoidal minima with different depths, an
irregularity near where hot-spot influence might be expected, and primary
minima not midway between secondary minima. A marginally refined orbital period
of 227.52 +/- 0.05 days is suggested.