Responsa for Shabbat 208:11
תנא נתכוין לכתוב אות אחת
R. Ammi said: If one writes one letter in Tiberias and another in Sepphoris,<span class="x" onmousemove="('comment',' Two towns of Galilee. ');"><sup>27</sup></span> he is culpable: it is one [act of] writing but that it lacks being brought together. But we learnt: IF ONE WRITES ON TWO WALLS OF A HOUSE, OR ON TWO LEAVES OF A LEDGER WHICH CANNOT BE READ TOGETHER, HE IS NOT CULPABLE? — There the act of being brought together is lacking;<span class="x" onmousemove="('comment',' Before the two letters can be read as one the paper must be cut away. so that they can be put together. ');"><sup>28</sup></span> but here the act of bringing together is not lacking.<span class="x" onmousemove="('comment',' E.g.. if the letters are written on the edges of two boards. ');"><sup>29</sup></span> A Tanna taught: If one corrects one letter, he is culpable. Now, seeing that if one writes one letter he is not culpable. if he [merely] corrects one letter he is culpable?<span class="x" onmousemove="('comment',' Surely not. ');"><sup>30</sup></span> — Said R. Shesheth: The circumstances here are e.g., that he removes the roof [i.e.. the upper bar] of a heth and makes two zayyin thereof. Raba said: E.g.. he removes the projection of a daleth and makes a resh thereof.<span class="x" onmousemove="('comment',' In a Scroll of one of the Biblical books. This constitutes a complete labour, because one may not permit a Scroll of Scripture to remain with an error. ');"><sup>31</sup></span> A Tanna taught: If one intended writing one letter,