What is a dictionary of prosody, designed as an aid in writing Greek or Latin poetry. He set to work . . . without gradus or other help. T. Hughes called?

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gradus — A dictionary of prosody, designed as an aid in writing Greek or Latin poetry. He set to work . . . without gradus or other help. T. Hughes. (Webster's 1913.)

What is a dictionary of prosody, designed as an aid in writing Greek or Latin poetry. He set to work . . . without gradus or other help. T. Hughes called?

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