My final Christmas upload this year. This is a medley of:
0:12 Joy to the World
1:38 We Three Kings of Orient Are
2:36 Angels From The Realm of Glory
3:21 What Child Is This
5:13 O Come O.Come Emmanuel
6:10 reprise We Three Kings of Orient Are
6:39 The First Noel
It was published in "Christmas Organ Album: Fourteen Characteristic Pieces" by J. Fischer & Bro. of Glen Rock, IN in 1961. The book is readily available on Amazon and other reseller websites.
No credit is given for whoever arranged this piece.