Unidentified
There are a number of extant works matching the description which may be considered as candidates, though measurements don't quite match. For example, a work for sale with Whitfield Fine Art London in 2010s, 49.5 x 46.5, a work for sale with Christie's London 6th July 2017, 35.7 x 29.3, or a work in the Prado (no. 1491), 47 x 36
Van der Doort c.1639
WS 58, № 91
Sir Anthony van Dyck, painted overseas
Old Man, grey hair and beard
Walpole Society reference (1960):
Measurements (Van der Doort):
1ft 4in x 1ft 0in (40.6 x 30.5cm) [1ft 5in x 1ft 11in struck through]
Frame:
only a straining frame
Provenance:
when Prince of Wales
Gift / Exchange / Bought / Inherited:
bought
Hang notes:
on the twelfth window post
Location:
Room description extended:
Towards the Orchard
Original Manuscript page number:
MS. Ash. 1514, f. 79
Identification certainty:
Unknown