Who sowed a seed in the flourishing field of linguistics in sign language? See William Stokoe, Jr., the father of ASL linguistics.
"Sign [language] is closer to the language of the mind." -- Edward Klima (Sacks, Oliver. Seeing Voices: A Journey into the World of the Deaf, p 112).
"We see them, in Sign (Language), at every level -- lexical, grammatical, syntactic -- a linguistic use of space: a use that is amazingly complex, for much of what occurs linearly, sequentially, temporally in speech, becomes simultaneous, concurrent, multilevelled in Sign. The "surface" of Sign may appear simple to the eye, like that of gesture or mime, but one soon finds that this is an illusion, and what looks so simple is extraordinarily complex and consists of innumerable spatial patterns nested, three-dimensionally, in each other." -- Sacks, Oliver. Seeing Voices: A Journey into the World of the Deaf, p 87.