Charles Barbier, a French soldier, visited his school and shared his invention of night writing, a code of 12 raised dots to share information on battlefields.
Thadhail an saighdear Frangach Charles Barbier air an sgoil aige agus sheall e an sgrìobhadh oidhche aige do na h-oileanaich, seo còd le 12 dotagan togta gus fiosrachadh a cho-roinneadh air a’ bhlàr.