* See especially Pobedonostsef, in the Russki Vestnik, 1858, No. 11, and “Istoritcheskiya izsledovaniya i statyi” (St. Petersburg, 1876), by the same author; also Pogodin, in the Russkaya Beseda, 1858, No. 4.

Although the peasants in ancient Russia were free to wander about as they chose, there appeared at a very early period—­long before the reign of Boris Godunof—­a decided tendency in the Princes, in the proprietors, and in the Communes, to prevent migration.  This tendency will be easily understood if we remember that land without labourers is useless, and that in Russia at that time the population was small in comparison with the amount of reclaimed and easily reclaimable land.  The Prince desired to have as many inhabitants as possible in his principality, because the amount of his regular revenues depended on the number of the population.  The landed proprietor desired to have as many peasants as possible on his estate, to till for him the land which he reserved for his own use, and to pay him for the remainder a yearly rent in money, produce, or labour.  The free Communes desired to have a number of members sufficient to keep the whole of the Communal land under cultivation, because each Commune had to pay yearly to the Prince a fixed sum in money or agricultural produce, and the greater the number of able-bodied members, the less each individual had to pay.  To use the language of political economy, the Princes, the landed proprietors, and the free Communes all appeared as buyers in the labour market; and the demand was far in excess of the supply.  Nowadays when young colonies or landed proprietors in an outlying corner of the world are similarly in need of labour, they seek to supply the want by organising a regular system of importing labourers—­using illegal violent means, such as kidnapping expeditions, merely as an exceptional expedient.  In old Russia any such regularly organised system was impossible, and consequently illegal or violent measures were not the exception, but the rule.  The chief practical advantage of the frequent military expeditions for those who took part in them was the acquisition of prisoners of war, who were commonly transformed into slaves by their captors.  If it be true, as some assert, that only unbaptised prisoners were legally considered lawful booty, it is certain that in practice, before the unification of the principalities under the Tsars of Moscow, little distinction was made in this respect between unbaptised foreigners and Orthodox Russians.* A similar method was sometimes employed for the acquisition of free peasants:  the more powerful proprietors organised kidnapping expeditions, and carried off by force the peasants settled on the land of their weaker neighbours.