Another Book of Songs

In the handwriting of Abu 'l-Hasan ‘Ali b. Muhammad b. ‘Ubayd b. al-Zubayr al-Kufi al-Asadi,
I found it written that he was told by Fadl b. Muhammad al-Yazidi:

I was with Ishaq b. Ibrahim al-Mawsili when a man came up and said, "O Abu Muhammad! [That is, Ishaq.] Give us the Book of Songs."
      "Which one?" said Ishaq. "The book I wrote, or the one that was written in my name?"—meaning by the former, his book of reports on individual singers, and by the latter, the Big Book of Songs that's out there.

I was informed by Abu 'l-Faraj al-Isbahani that he was told by Abu Bakr Muhammad b. Khalaf Waki‘ that

Hammad b. Ishaq said: "My father never wrote that book," (meaning The Big Book of Songs) "nor claimed credit for it. Most of the lyrics in it are falsely inserted into reports of singers who never sang them. To this day, most them have never been performed. Comparison to the songbooks my father actually wrote shows how worthless that book is. It was cobbled together after his death by one of his copyists, except for the opening chapter on the permissibility [of music], which my father did write, although the reports in it are my narrations [from my father]."

Abu 'l-Faraj told me: This is the story as I remember Abu Bakr Waki‘ telling it, though not verbatim. And I heard from Jahza [b. Musa al-Barmaki] that he knew the copyist's name:

"The copyist was one Sindi b. ‘Ali, who had a shop along the Archway of Rubbish and used to copy books for Ishaq.* For the book that he foisted on him, he worked with a collaborator."
      This is the book that used to be known by the title al-Surāh (The Night-Travelers). Its first chapter is on permissibility [of music], and is the work of Ishaq without a doubt.

From the Fihrist of (Ibn) al-Nadim

* Footnote by Ayman Fu’ad Sayyid: "In the sources at my disposal, I do not find [in Baghdad] an 'Archway of Rubbish.' Perhaps it is the Archway of al-Harrani mentioned ahead [in the entry for Ja‘far b. Ahmad al-Marwazi] that is meant. In al-Ya‘qubi's day, there were over a hundred stationers' shops in the markets of that area."