Comparison of our identifications of entries in Crux in Secunda Classis and Houtman. In this projected image of the constellation Crux red stars and numbers refer to Secunda Classis, blue to Houtman and black to the Hipparcos Catalogue. The axes give the distances in ecliptic longitude and latitude to the center of the constellation, roughly in degrees (for details of the projection used, see Sect. C).