三さん伸しん

noun

second postscript

Used in letter writing to add a note after a first postscript (二伸). The number 三 indicates it is the third addition overall, following the main text and the first postscript.

• 手て紙がみの最さい後ごに「三さん伸しん」と書かいて、もう一ひとつ用よう件けんを付つけ加くわえた。

  At the end of the letter, I wrote 'second postscript' and added one more matter.