One the early forms of instituting an heir was a sale of the familia or headship of the family to the intended heir, with all its rights and duties. /3/ This sale of the universitas was afterwards extended beyond the case of inheritance to that of bankruptcy, when it was desired to put the bankrupt's property into the hands of a trustee for distribution. This trustee also could make use of the fiction, and sue as if he had been the bankrupt's heir. /4/ We are told by one of the great jurisconsults that in general universal successors stand in the place of heirs. /5/ The Roman heir, with one or two exceptions, was always a universal successor; and the fiction of heirship, as such, could hardly be used with propriety except to enlarge the sphere of universal successions. So far as it extended, however, all the consequences attached to the original fiction of identity between heir and ancestor followed as of course. [362] To recur to the case of rights acquired by prescription, every universal successor could add the time of his predecessor's adverse use to his own in order to make out the right. There was no addition, legally speaking, but one continuous possession. The express fiction of inheritance perhaps stopped here. But when a similar joinder of times was allowed between a legatee or devisee (legatarius) and his testator, the same explanation was offered. It was said, that, when a specific thing was left to a person by will, so far as concerned having the benefit of the time during which the testator had been in possession for the purpose of acquiring a title, the legatee was in a certain sense quasi an heir. /1/ Yet a legatarius was not a universal successor, and for most purposes stood in marked contrast with such successors. /2/ Thus the strict law of inheritance had made the notion familiar that one man might have the advantage of a position filled by another, although it was not filled, or was only partially filled, by himself; and the second fiction, by which the privileges of a legal heir in this respect as well as others had been extended to other persons, broke down the walls which might otherwise have confined those privileges to a single case. A new conception was introduced into the law, and there was nothing to hinder its further application. As has been shown, it was applied in terms to a sale of the universitas for business purposes, and to at least one case where the succession was confined to a single specific thing. Why, then, might not every gift or sale be regarded as a succession, so far as to insure the same advantages?