Concestor 16, as we shall see, looked like a lizard (see plate 19). The gap from Concestor 15, which looked like a shrew, is too great to leave unbridged. We have to examine the mammal-like reptiles as shadow pilgrims, as though they were living pilgrims joining our march—although they shall not actually tell tales. But first, some background information on the timespan involved, because it is very long.
