Stacked Cnα, Cnβ, Cnγ, Cnδ, and Cnє radio-recombination lines with Henα, Henβ, Henγ, Henδ, and Henє radio-recombination lines toward the ten targeted positions. In the position BAR-INSIDE the component 7.5 km s⁻¹ blue of the main component may be a radio-recombination line from sulfur, while detection of the sulfur RRL in other positions is hampered by the carbon RRL component corresponding to the Veil (cf. Sect. 4.1). Spectra in in the upper top are offset from the C/Henє spectrum in steps of 0.025 K, sand pectra in the lower two rows are offset in steps of 0.01 K.