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 ?