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Until I was thirteen years old I lived at home and was taught by my father. Lessons occupied only two or three hours each morning, otherwise he left me to my own devices, sometimes helping me with what I chose to do, more often leaving me to work it out for myself. 

- From An Autobiography by R.G. Collingwood

Collingwood was the Waynflete Professor of Metaphysical Philosophy in the University of Oxford. The book was published in 1938.