PORTRAITS OF LEEUWENHOEK 355 
I formerly attached but little importance to this small 
detail—believing it to be on a level with the rest of the 
engraved title. Buta few years ago Dr W. H. van Seters, of 
Leyden, when collecting material for the ‘‘ Leeuwenhoek 
Film ” (which has now been exhibited on various occasions : 
cf. Kaiser, 1924), rediscovered’ an old design above which 
Leeuwenhoek once wrote a motto and his name. Dr van 
Seters kindly sent me a photograph of this drawing (included 
in the film), which reveals several points of interest. 
Leeuwenhock’s signature (undoubtedly genuine) is there dated 
30 April 1698. It is written at the top of the page, and is 
followed by a large allegorical drawing illustrating his motto f 
(“ Door Arbeyt en Naarstigheijt””). But this drawing was 
evidently added later, as it is signed “ J. Goeree del: 1707.” 
Moreover, it bears, as a pendant, the miniature portrait of 
Leeuwenhoek incorporated later in the engraved titles of his 
last letters. This picture was therefore probably made in 
1707—not at the date of publication of the Send-brieven 
(1718). Careful study of the engraving has also convinced 
me that it was made with considerable care, and under 
Goeree’s own supervision—as the words “sculpt: Durex.” 
sndicate. 1 therefore now regard this portrait (shown in my 
Plate XII) as a genuine and conscientious attempt, by fairly 
competent artists, to delineate Leeuwenhoek as he appeared 
in his 75th year. In any case, this is the only known portrait 
of him in his later life which can make any pretence to 
authenticity. 
In conclusion, I must mention three slyptic representa- 
tions of Leeuwenhoek. The first is the profile portrait on 
the silver medal awarded to him in 1716 by the University 
of Louvain (see p. 80). This has already been depicted by 
van Loon and Haaxman. The medal is now in the Gemeente- 
museum at Delft; and as it was struck during his lifetime, its 
fA ee 
1 Tt was exhibited at the Leeuwenhoek Celebration in 1875, and was 
described by Harting (1876, p. 120). I think the picture was very probably 
intended as a title-page for the projected edition of L.’s letters (following 
No. 146 and preceding the Send-brieven) which was never published in 
Dutch or Latin.—According to de Lint (1931) the original is now in the 
collection of Dr J. van der Hoeven at Eefde [near Zutphen]. It is 
reproduced in Opusc. Select. Neerland., Vol. IX, Pl. III (1931). 
2 Given in full on p. 299 supra. 
