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In page Thomas Henry Huxley:

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Aged 20, Huxley was too young to apply to the Royal College of Surgeons for a licence to practise, yet he was "deep in debt".[1] So, at a friend's suggestion, he applied for an appointment in the Royal Navy. He had references on character and certificates showing the time spent on his apprenticeship and on requirements such as dissection and pharmacy. William Burnett, the Physician General of the Navy, interviewed him and arranged for the College of Surgeons to test his competence (by means of a viva voce).[citation needed]