כא היכי דמי
21 If one had dug a pit nine handbreadths deep and another came along and completed it to a depth of ten handbreadths, the latter person is liable. Rabbi says: The latter person is liable in cases of death,<span class="x" onmousemove="('comment',' Cf. Tosaf, B.K. VI, 3 and infra 51a. ');"><sup>18</sup></span> but both of them in cases of injury!<span class="x" onmousemove="('comment',' As without the additional handbreadth done by him the pit would have been nine handbreadths deep which could not occasion any fatal accident; cf, supra p. 7. ');"><sup>19</sup></span> — R. Papa said: The Mishnaic ruling<span class="x" onmousemove="('comment',' For even a pit nine handbreadths deep could occasion injuries. ');"><sup>20</sup></span> deals with cases of death and is unanimous.<span class="x" onmousemove="('comment',' Which declares the latter person 'who perpetrated part of the damage' liable. ');"><sup>21</sup></span> Some read: May we say that the Mishnah is not in accordance with Rabba? — R. Papa thereupon said: It deals with cases of death and is unanimous. R. Zera demurred: Are there no other instances?<span class="x" onmousemove="('comment',' I.e., is even in accordance with Rabbi. ');"><sup>22</sup></span> Behold there is [the case] where an ox was handed over to the care of five persons and one of them was careless, so that the ox did damage; that one is liable! — But in what circumstances? If without the care of that one, the ox could not be controlled, is it not obvious that it is that one who perpetrated the whole of the damage?<span class="x" onmousemove="('comment',' To illustrate the perpetration of a part of the damage involving liability for the whole of the damage. ');"><sup>23</sup></span> If, [on the other hand] even without the care of that one, the ox could be controlled, what, if anything at all, has that one perpetrated? R. Shesheth, however, demurred: Behold there is [the case] where a man adds a bundle [of dry twigs to an existing fire]! — But in what circumstances?