Bishop Samuel Ajayi Crowther was a descendant of King Abiodun Adegoolu, the 29th Alaafin of Oyo Empire; who reigned between 1770 and 1789 an 18th-century king. He was the grandfather of Herbert Macaulay (1864-1946), founder of Nigeria's first political party, whose father, Thomas Babington Macaulay (1826-1878), founded the first secondary school in Nigeria in 1859. The first book in Igbo language (Isoama-Ibo: A Primer) was written by a Yoruba man, the first African Bishop, Samuel Ajayi Crowther (1809-1891) in 1857. The book had 17 pages; with the Igbo alphabets, words, phrases, sentence patterns, the Lord's Prayer, the Ten Commandments, and translations of the first chapters of Matthew's Gospel. In 1882, Crowther also wrote the "Vocabulary of the Ibo Language", the first comprehensive dictionary in the Igbo language.