RT @HistoryInPics: Charles Darwin’s cross-writing, a technique for saving writing paper, ca. 1828. http://t.co/ipXsVReMj0

Charles Darwin’s cross-writing, a technique for saving writing paper, ca. 1828. http://ift.tt/1kuFcfO

— History In Pictures (@HistoryInPics) February 10, 2014

Scritto su Twitter http://ift.tt/1dQ1z7o

February 10, 2014 at 06:39AM