Outer-galaxy finding chart for the sources studied here except B1730-130 at l = 12°, see Table 1. The colored background is reddening at 6′ resolution (Schlegel et al. 1998) truncated at a maximum of 2.4 mag as shown on the bar scale at left. Positions of continuum sources are indicated (see Table 1) along with a few other objects: the high-latitude molecular clouds MBM23 and MBM 53 (Magnani et al. 1985); TMC-1; SAMS 1 and 2 (Heithausen 2004); and two Perseus stars commonly used for optical absorption line studies.