Frontmatter -- Contents -- Acknowledgments -- Abbreviations -- Chapter 1. Postlingual Deafness -- Chapter 2. The Yoruba: the people and their language -- Chapter 3. Deafness, Societal Attitude, and Language Adaptation -- Chapter 4. Yoruba Sign Language: A Basic Description -- Chapter 5. Postlingual Deafness at Age 5: Patterns of Loss after 25 Years -- Chapter 6. Postlingual Deafness at Age 8: Patterns of Loss after 25 Years -- Chapter 7. The Connection of Postlingual Deafness Language Loss to Acquisition -- Chapter 8. Summary, Suggestions for Rehabilitation and Further Research -- References -- Index