The first two of these may be said to be practically quite distinct from the third class, and intimately connected _inter se_. The boon-work would seem to be a necessary corollary of the _limitation_ of the week-work. If the lord had had unlimited right to the whole work [p079] of his villein tenant all days a week, and had an unrestricted choice as to what kind of work it should be, week-work at the lord's bidding might have covered it all. But custom not only limited the number of days' work per week, but also limited the number of days on which the work should consist of ploughing, reaping, and other work of more than usual value, involving oxen or piece-work, beyond the usual work of ordinary days. The _week-work_, limited or otherwise, was evidently the most _servile_ incident of villenage. The payments in money or kind, or in work of the third class, to which the word _gafol_, or tribute, was applied, were more like modern rent, rates, and taxes than incidents of serfdom. Comparing the services of the villani with those of the cottiers or bordarii, the difference evidently turns upon the size of the holdings, and the possession or non-possession of oxen. «Cottiers' services.» Naturally ploughing was a prominent item in the services of the villanus holding a virgate, with his 'stuht,' or outfit of two oxen. As naturally the services of the bordarius or cottager did not include ploughing, but were limited to smaller services. But apparently the services of each class were equally servile. Both were in villenage, and _week-work_ was the chief mark of the serfdom of both. Besides the servile week-work and '_gafol_,' &c., there were also other incidents of villenage felt to be restrictions upon freedom, and so of a servile nature. Of these the most general were-- «Other servile incidents.» The requirement of the lord's licence for the marriage of a daughter, and fine on incontinence. [p080] The prohibition of sale of oxen, &c., without the lord's licence. The obligation to use the lord's mill, and do service at his court. The obligation not to leave the land without the lord's licence. It was the week-work of the villanus, and these restrictions on his personal liberty, which were felt to be serfdom.[106] «All limited by custom.» But these servile incidents were limited by custom, and this limitation by custom of the lord's demands, as well as the more and more prevalent commutation of services into money payments in later times, were, as has been said, notes and marks of a relaxation of the serfdom. The absence of these limitations would be the note and mark of a more complete serfdom. Thus, in pursuing this economic inquiry further back into Saxon times, the main question will be whether the older serfdom of the holder of yard-lands was more or less unlimited, and therefore complete, than in the times following upon the Norman conquest. «The evidence has led up to the Domesday Survey.»