...Then thehold taken by this animal is more retentive than is strictly natural... 
Dinks, Mayhew, and Hutchinson 「The Dog」
...But when well affected, Mercury giveshis subjects a strong, vigorous, active mind, searching and exhaustive,a retentive memory, a natural thirst for knowledge...
Richard A. Proctor 「Myths and Marvels of Astronomy」
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