Reference for Yevamot 231:4
אמר אביי אף לדידי דאמינא חיישינן הכא לא חיישינן דהא קאמרי סהדי דבנהרדעא הוה מאי בעא בסורא
[it may be replied] are acquired by <i>mesirah</i>.<span class="x" onmousemove="('comment',' V. Glos. The delivery of the note completes the legal transfer after which the seller can no longer withdraw. Cf Kid. 47b. p BB 76a. 77a. ');"><sup>10</sup></span> A letter of divorce was once found at Sura, and in it appeared this entry: 'In the town of Sura, I, Anan son of Hiyya. a Nehardean, released and divorced my wife So-and-so.' Now when the Rabbis searched from Sura to Nehardea [they found that] there was no other Anan son of Hiyya save one Anan son of Hiyya of Hagra<span class="x" onmousemove="('comment',' [Hagronia. a suburb of Nehardea (Obermeyer p. 266)]. ');"><sup>11</sup></span> who was at that time at Nehardea, and witnesses came and declared that on the day on which the letter of divorce was written Anan son of Hiyya of Hagra was with them.<span class="x" onmousemove="('comment',' In Nehardea; while the letter of divorce was written at Sura. Owing to the distance between the two towns it was impossible for him to have been in the one as well as in the other on the same day. ');"><sup>12</sup></span>