Graphs with diameter d and girth 2d+1 are known as Moore graphs. They were introduced by Hoffman and Singleton in a paper that can be viewed as one of the prime sources of algebraic graph theory.

Elsewhere he wrote: We see in baptism also that Christ, the Holy Ghost, grace, forgiveness of sins, our gainbirth which they call regeneration, do longer remain in them that be baptised than they do remain with the waters wherewith the faithful be washed. For the water is an instrument which God vouchsafeth to use that we may be grafted into Christ by baptism and we may be born again by the Holy Ghost.

Besides, seeing a shark in an aquarium tank is not the same as seeing a shark in the wild, in its natural, pelagic habitat.

The lady understands best what is required to make others like herself, and it is required to make all girls into ladies; not, perhaps, into delicate white-handed beauties, but to give their souls that gentleness, and their minds that beauty, which are better than the whiteness of lilies or the morning blush of the summer rose.