Spatial distribution in Galactic coordinates. Top: all selected targets for spectroscopic follow-up with those already observed in green; the remaining targets are shown in blue for an interstellar reddening lower than E(B − V)≤0.5 mag, and red for higher reddening of up to 1.0 mag. Bottom: all dLHdC stars colour-coded with their respective geometric distances rgeom inferred by Bailer-Jones et al. (2021). The names of the dLHdC stars that are almost certainly located in the Galactic halo are indicated. The location of the new RCB star, C105, is indicated with a black star.