According to the Internet source given below, Carl [Charles] Rosier was a German violinist and composer working at the Bonn court of Elector Maximilian Heinrich until 1675. From 1683-99 he was in the Netherlands, associated with Carolus Hacquart. He evetually became Kapellmeister of both the court and Cologne cathedral.

Websites:
	Carl Rosier	Brief biography by HOASM

Recorder Sheet Music

Drei Triosonaten (A/A/BC) 52 pages. Publisher: Breitkopf & Härtel (KM--02165)

Zwei Triosonaten (A/A/Violin/BC) Arr./Editor: Hugo Ruf Level: 3 Publisher: Hortus Musicus (HM231)