(a) Signal versus Topocentric Frequency from the horn telescope pointing at l = 124°. (b) The polar map of distance versus galactocentric azimuthal angle of detected H I created using the horn data out to 20 kpc, overlaid on a theoretical map of the galaxy provided by J. P. Vallée (2017). (c) The corresponding l = 124° spectrum from the GBO 20 m telescope. (d) The corresponding polar map using the GBO 20 m data.