The following is the letter that Kanetane wrote requesting Harumichi to complete the book; the passages are extracted from the article 'the continuation of Koshi-den' of "Yano Hiromichi" (edited by Taro YANO, published in 1933).
では、その依頼文書簡を、矢野太郎編『矢野玄道』S8年版、古史伝の続修より抜粋する。