The initials S.B. in the center of this elaborate collection of darning samples are most likely those of the instructor, as there are several surviving examples with the same initials. It’s possible that these initials belonged to a teacher at an orphan school in Amsterdam, and the other initials in decorative cartouches surrounding the center, and surmounted by crowns on the edges, are likely to be those of other teachers, and administrators or supporters of the institution.