PREFACE, 
nicate with those of our own country, to the mutual 
advantages of each, and to the manifest advance- 
ment of the common cause. 
* €] IR at 1 1 zz 1 1 
concerning succulent botany, is wüquestionably 
that of His Highness the Prince de Salm Dyck, at 
Dyck in Holland; the illüstrious proprietor of 
which has not only condescended to present to 
the author the. published Catalogue of his Garden 
at Dyek, (Plante? Succulentee Hor Horti Dyckensis, 
printed A.D. 1816). and-his'still more useful- de- 
seriptions of Aloés, (Catalogue Raisonné des es- 
pàces et variétés d'Aloés; printed A.D. 1817). on 
whieh he-meditates-a splendid Monograph with 
—— E ;—but has, moreover, in 
Very ni i$ instanbes- epmi icated the livin 
plants themselves as far as he-óihà able; wherever 
tliey were wanting; togetherwith valuable censis 
in the letters which accompanied them... 
very excellent and most assiduous friend, Monsieur 
van Marum, (Chevalier of tlie Order. of the Bel- 
gique Lion; perpetual Secretary to the.Society of 
Seienees in Holland, and the Director of tbe Tey- 
: leran 
-Müseum at Haarlem, and a distinguished 
cultivator of succulent botany,) has not only expe- 
dited te-the author those Benevolent benefactions 
of the Prince, but has frequently augtented the 
packets by still other and equally interesting spe- 
