We may start with the observation, that privileged villains or villain socmen are not the only people to be found on the soil of the ancient demesne. There are free tenants there and pure villains too[220]. Free socage is often mentioned in these manors, and it is frequently pleaded in order to get a trial transferred to the Common Law Courts. When the question is raised whether a tenement is free or villain socage, the fact that it has been conveyed by feoffment and charter is treated, as has just been pointed out, as establishing its freehold character and subjecting it to the ordinary common law procedure[221]. On the other hand, registers and extents of ancient demesne manors sometimes treat separately of 'nativi' or 'villani' as distinguished from the regular customary tenants, and describe their services as being particularly base[222]. In trials it is quite a common thing for a lord, when accused of having altered the services, to plead that the plaintiffs were his villains to be treated at will. Attempts were made in such cases to take advantage of the general term 'men of ancient demesne,' and to argue that all the population on the crown manors must be of the same condition, the difference of rank applying only to the amount and the kind of services, but not to their certainty, which ought to be taken for granted[223]. But strictly and legally the lord's plea was undoubtedly good: the courts admitted it, and when it was put forward proceeded to examine the question of fact whether the lord had been actually seised of certain or of uncertain services[224]. It is of considerable importance to note that the difference between villains pure and villains privileged was sometimes connected with the distinction between the lord's demesne and the tenant's land in the manor[225]. The demesne proper was frank fee in the hands of the lord, and could be used by him at his pleasure. If he chose to grant it away to villains in pure villainage, the holdings thus formed could have no claim to rank as privileged land. It was assumed that some such holdings had been formed at the very beginning, as it were, that is at a time beyond memory of man, but tenements at will could be created at a later time on approved waste or on soil that had escheated to the lord and in this way passed through his demesne[226]. One of the reasons of later confusion must be looked for in the fact that the pure villain holdings gradually got to be recognised at law as copyhold or base customary tenures. They were thus brought dangerously near to ancient demesne socage, which was originally nothing but base customary tenure. The very fact of copyhold thus gaining on villain socage may have pushed this last on towards freehold. Already the Old Natura Brevium does not know exactly how to make distinctions. It speaks of three species of socage--free, ancient demesne, and base. The line is soon drawn between the first two, but the third kind is said to be held by uncertain