{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Letters of Alexander von Humboldt to Varnhagen von Ense. From 1827 to 1858. With extracts from Varnhagen's diaries, and letters of Varnhagen and others to Humboldt","author_name":"Alexander von Humboldt, Karl August Varnhagen von Ense, Friedrich Kapp","thumbnail_url":"https://www.ebooknetworking.net/books/117/757/big1177573741.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1177573741.html\">Letters of Alexander von Humboldt to Varnhagen von Ense. From 1827 to 1858. With extracts from Varnhagen&#039;s diaries, and letters of Varnhagen and others to Humboldt</a>","width":400,"height":300}