This book presents the first systematic study of Gule, a dormant East African language isolate, offering a tentative grammatical sketch based on historical documentation collected by Brenda Z. Seligman. Readers will gain valuable insights into a previously unstudied language through systematic grammatical analysis and comparative linguistic examination of the available materials, including a previously unknown audio recording made in 1966 by Wendy R. James. The book delivers this through detailed documentation analysis, identification of areal linguistic phenomena shared with neighboring East African languages, and thorough vocabulary assessment that establishes Gule’s unique status among world languages.