This is a try to transcript the openning epistle of Codex Parama 2440. The codex is containing various writings of Abner of Burgos and other Jewish-Christian polemics mostly from the 13th century. The letter itself was written by Leon of Modena.
The original manuscript is availble at https://www.nli.org.il/he/manuscripts/NNL_ALEPH000068930/NLI