Left panel: color–magnitude diagram of point sources within ﹩20^{\prime\prime} ﹩ of MADCASH J074238+652501-dw. Typical photometric errors as a function of magnitude are shown at the left side of this panel. The other three panels show CMDs of nearby “blank-sky” regions of the same size. In each panel, we show Padova isochrones of old (10 Gyr) populations with metallicities of [M/H] = −2.2, −1.5, −1.0, and −0.5, at D = 3.39 Mpc (the distance to MADCASH J074238+652501-dw; see Section 4.1). There is an overdensity of resolved sources at the position of the dwarf, consistent with an old, metal-poor RGB, extending ∼2 mag below the RGB tip.