Inset from Figure 3 of the Aquila Rift region using the same background and markers for the HH objects and candidate progenitors. We also show stars in the SCYA-74 population from R. Kerr et al. (2023; blue dots) and group 344 from L. Prisinzano et al. (2022; green triangles), both of which overlap with the locations of the HH progenitors in 3D space, especially in the north of LDN 617.