...Moderately proficient at all gamesas a boy and an undergraduate, he hadfound that swimming was the only sportin which he excelled, and he had cultivatedand maintained the art... 
Various 「Ainslee's magazine, Volume 16, No. 2, September, 1905」
...In addition to these, I myself have a dog, "Ava," by name a daughter of Lola, who is already proficient in both accomplishments...
Henny Kindermann Agnes Blake 「Lola」
...The little boy is not very proficient in the imitation, and sister corrects him time after time...
Edward S. Curtis 「The North American Indian」
...In order to make himself more proficient in calculatingastronomical tables he studied arithmetic and geometry, and learnedmathematics without the aid of a master...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...At an early age he was occupied in observing celestial objects, makingresearches in optics, and acquiring a proficient knowledge of astronomy...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...He became proficient in Italian and Greek, studiedmathematics, and read books on astronomy...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
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