Seen H42 had finally to arrived Harrington, Delaware on NS Delmarva Secondary Branch from NS Indian River Secondary Branch so they was just had to pick empty stone cars outbound for 13G northbound train. So, they was just had to stop and, allow conductor throw switch (visible) on background on NS Harrington yard so then they shift to reverse back to into NS Harrington yard..I believe H42 pick up empty stone cars from in Millsboro, Delaware on NS Indian River Secondary Branch