[M5 Fig1]

It is generally known that the globular cluster M 5 lies in Serpens Caput. Looking into the pretty Johann Hevelius' atlas Firnamentum Sobiescianum sive Uranographia (1690) one finds, however, the cluster's position to be surrounded by a small and quite forgotten constellation Mons Menalus (note that the chart is a mirror image of the sky). Does anyone know more about it ?