Ceil Lucas. Ph.D. was raised in Guatemala City and Rome, Italy. She is Professor of Linguistics at Gallaudet University, where she has taught since 1982. She is a sociolinguist with broad interests in the structure and use of sign languages. She has co-authored and edited many articles and books, including The Linguistics of American Sign Language, 4th ed. (with Clayton Valli and Kristin Mulrooney, 2005)