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Er habe auf der ganzen Reise in anatomischen und zoologischen Kabinetten gearbeitet. Die Stationen waren Frankfurt, Bonn, Leiden, Amsterdam und Paris, wo er sich zwei Monate aufhielt. Die weitere Route ging über Dijon, Genf, Bern, Basel, Zürich, Schaffhausen, Freiburg, Straßburg, Karlsruhe, Heidelberg, Darmstadt und Frankfurt zurück. Für seine "Ornithologia anatomia" habe er reich geerntet. Für das akademische Museum habe er in Paris und Amsterdam bei Naturalienhändlern gekauft. Bietet eine kleine Sendung für das Königsberger Museum an, sofern nicht Burdach von seiner Reise schon genug mitgebracht habe. Von Marquier habe er Hagenii für Baers Museum erhalten. Dankt für die übersandte Schrift, die er neben einer Unmenge von Briefen und Paketen vorfand. 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