Also called 'Singers in an egg'
Similar compositions can be found at the instance (107 x 73) that belonged to the private collection of Baron de Pont Alba in Senlis (auctioned in 2005 by Drouot in Paris) and with an unknown private in Basel. A partially similar drawing can be seen in the Kupferstichkabinett in Berlin. The notes and text on the score are a beginning of the song that Thomas de Crecquellion composed before 1558!