I acknowledge @Partitura as editor of the score and for these notes:
Karges was familiar with the compositions of Sweelinck through Andreas Düben (1597 – 1662). Düben was a pupil of Sweelinck in Amsterdam from 1614 to 1620. Karges must have had access to written source material of the music of Sweelinck and his pupils. Karges’ Fantasia in D, written on folio 24 of the manuscript, is based on Sweelinck’s Fantasia SwWV 260.
The work is charming at the same time as a little demanding owing to the constant changes of manuals to bring about the echos. It requires concentration in order to stay on track!