A preparatory study for the altarpiece in Sant'Ivo alla Sapienza, Rome, left unfinished by the artist on his death in 1669 and finished by his pupil Giovanni Ventura Borghesi after 1674 (G. Briganti, op. cit., 1982, no. 138, fig. 282). The Holkham drawing is the earliest of the known preparatory drawings; another is in the Uffizi (Disegni italiani della collezione Santarelli sec. XV-XVIII, Florence, 1967, no. 67) and a bozzetto is in Palazzo Pallavicini, Rome, O. Ferrari, Bozzetti italiani dal Manierismo al Barocco, Naples. The lower register of the Holkham drawing is similar to the final composition, with minor changes to the group of the poor and alterations to the figures behind the Saint. The upper part of the composition in this study differs more noticeably from the picture; it is arched instead of rectangular, the positions of the saints except for Jerome and the one at the right differ, and in the painting the two halves are clearly separated as putti hold up the borders of a tapestry. This compositional device clearly delineates the real world below and that of heaven above, a distinction which is blurred in the present drawing. Professor Merz has kindly pointed out that there is a copy of this drawing, without the strips added to the sides, at Düsseldorf (no. FP 379)