Both letters were written by Abraham Hendrik Verster van Wulverhorst (1797-1882), living in Noordwijk Binnen, near Leiden, as a forester in the Dutch province of Zuid-Holland (he was "Inspecteur der Opperhoutvesterij"). The present letters contain detailed observations on the Salamander punctata (probably the European spotted salamandar now designated Salamandra salamandra). The letters further offer laudatory words regarding Heinrich Boie (1794-1827) who had also worked at the Rijksmuseum but had left for the Dutch East Indies to study the Southeast Asian fauna and, sadly, had died there in 1827. Also interesting remarks by Verster as a bird watcher on the bird migration: he had observed that the gallingo (snipe) and the rusticola (woodcock) were very early that year.
Edges of the second letter frayed. Otherwise in good condition.