This is an excerpt from Forme of Cury
(England, 1390)
The original source can be found at
the Project Gutenberg website
CHAWDOUN FOR SWANNES XX.VII. III. Take þe lyuer and þe offall of the Swannes & do it to seeþ in gode broth. take it up. take out þe bonys. take & hewe the flessh smale. make a Lyour of crustes of brede & of þe blode of þe Swan ysoden. & do þerto powdour of clowes & of piper & of wyne & salt, & seeþ it & cast þe flessh þerto ihewed. and messe it forth with þe Swan.
Other versions of this recipe:
Chaudyn for swannes (Fourme of Curye [Rylands MS 7])
To make Chawden for A Swan or for Wylde gose (Gentyll manly Cokere (MS Pepys 1047))