On a great estate the dwelling of the master, the villa proper, stood apart from the other buildings, which were built around a court-yard and all were enclosed with only one entrance which was guarded by a porter with a fierce watch-dog. The slaves that could be trusted worked out in the fields and the others were kept within the enclosure, often in underground chambers, and did indoor work. A great deal of the farm work was done by hand and for which they had a number of implements, such as spades, mattocks, rakes, hoes, and forks. They had different kinds of plows to suit the nature of the soil. They usually used oxen for plowing. The Romans understood about fertilizing and drainage and rotation of crops. It seems they had many different kinds of grain and practiced both fall and spring sowing. Next in importance to the grains were various kinds of pulse, the most useful being the _faba_, some variety of bean. They raised turnips as food for cattle and sheep. Among the animals raised on the farms were cattle, bred mostly for draught rather than for beef; horses and mules, race-horses commanding the highest prices; sheep and goats and hogs. Poultry-raising was quite important. Doves and thrushes and peacocks were raised and for which there was quite a demand. Since honey took the place of sugar, great attention was given to bee-culture. Two of the greatest industries were the raising of grapes for wine and olives for oil. Market-gardening employed quite a large number and it was quite profitable, especially near cities and large towns. There were various kinds of fruit-trees and grafting was a common practice. Beside fruit-trees other trees were raised, in particular trees for shade and ornament. "In considering the Roman farmer's year as a whole, we find that he computed rainy days and festivals at forty-five and reckoned on thirty days after the sowing when there was no field labor to be done. But on these thirty days, and on the stormy ones, there were ropes to make, baskets to weave, and other home-made utensils to prepare; while all the other instruments of the husbandman--his 'mute servants,' as Verro calls them--had to be repaired and thoroughly cleaned. Even on feast-days certain kinds of work were allowed, such as the cleaning of drains and the mending of highways, so that only the December Saturnalia seem to have afforded a complete holiday to the slaves.