VII. In the meanwhile an apparitor came to Appius from the Consul and said that the augurs were summoned. As Appius went out from the _villa publica_, a flock of pigeons flew in, whereupon Merula said to Axius: "If you had established a [Greek: peristerogropheion] you would think that these were your pigeons, although they are wild, for it is the custom to keep both kinds in a [Greek: peristerotropheion]. One is the wild dove (or, as some call them the rock dove, or _saxatilis_), such as live in the towers and dormers (_columines_) of a farm house, whence they get the name _columbae_, because, on account of their natural timidity, they seek the highest places on the roof. On this account wild doves usually frequent towers, to which they may fly from the fields of their own accord, and return.[177] The other kind of pigeons is tamer and are wont to seek their food at the very threshold of a house. This kind is usually white in colour, the wild variety being mottled but without any white. From these two stocks a third or mixed variety has been developed for commercial profit and these are collected in the place which some call a _peristereon_ (pigeon house), and others a _peristerotropheion_ (place for raising pigeons), where there are often confined as many as five thousand at a time. "A pigeon house is made like a great dome, with arched roof, a narrow entrance, and grilled windows or with wider lattices on all sides so that the interior may be well lighted and yet no snake or other such pest may have access. The walls and the dome within and the edges of the windows without should be smeared with light stucco to keep out rats and lizards, for nothing is so timid as a pigeon. A round nest should be provided for each pair of pigeons and these should be arranged in close order so that there may be established as many as possible of them ranked from the ground to the very dome. Each nest should have a door no bigger than necessary to enable the pigeons to go in and out but within should be of three palms in diameter. Under each rank of nests should be fastened planks two palms broad for the use of the pigeons as a vestibule on coming out. Water should be led into the pigeon house, both for them to drink and to bathe in, for pigeons are very clean birds. For this reason the keeper of the pigeons should sweep out the house several times a month, for that which soils it has so great a. value in agriculture that some writers even claim that it is the best of all manures. Furthermore, the keeper in these rounds may tend any pigeon which is ailing, remove any which are dead, and take out such squabs as are fit for market. Likewise, those which are setting should be transferred to a particular place, separated from the others by a net but from which the mothers may be free to get out of doors: which is done for two reasons: first, because if they become weary or decrepit from being cooped too long,