Date: September 1, 1889 through September 1, 1890 Event: Tarzan learned to read the child's primer and fully realized the purpose of letters. He also realized he was a man and not a Mangani. Source: "Age seventeen," ERB-Tarzan Of The Apes.
Date: September 1, 1887 through September 1, 1888 Event: Tarzan learned various combinations of letters which stood for the pictured figures in his books. Source: "Age fifteen," ERB-Tarzan Of The Apes.
Date: September 1, 1885 through September 1, 1886 Event: Tarzan kills Tablat, his foster ape father, and Kerchak begins to see the ape boy as a threat to his kingship. Source: "Age thirteen," ERB-Tarzan Of The Apes.
Date: September 1, 1882 through September 1, 1883 Event: Tarzan began to realize he was different then the Mangani. The ape boy become the greatest trickster of the tribe. Tarzan managed to enter his father's cabin for the first time. He killed Bolgani, the gorilla, after being attacked. Source: "Age ten," ERB-Tarzan Of The Apes.