Answer:
He used linear perspective in Little Nemo, and the techniques he used in Gertie the Dinosaur were keyframes, registration marks, tracing paper, the mutoscope action viewer and animation loops.
Explanation:
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Margaret "Meg" Murry O'Keefe is the main character in Madeleine L'Engle's Time Quintet of science fantasy novels, the daughter of two scientists, the sister of twins Sandy and Dennys Murry and telepath Charles Wallace Murry, and the mother of Polly O'Keefe and others in the O'Keefe series of books.