...It is not a thing (mark ye) that any one could do, but takes a gentleman of penetration... 
Robert Louis Stevenson 「Kidnapped」
...In their glance those eyes, flanking a high-bridged, intrepid nose, were of singular penetration and of a steady haughtiness that went well with his firm lips...
Rafael Sabatini 「Captain Blood」
...Protracted concentration upon the subject was giving him an extraordinary penetration of vision...
Rafael Sabatini 「Scaramouche」
... "It is—but I marvel at your penetration...
W. E. B. Du Bois 「The Quest of the Silver Fleece」
...However, this capacityof absorption has definite limits in each variety of plasm; living plasmis not soluble in water, but absolutely resists the penetration of anywater beyond this limit...
E. Walter Maunder 「Are the Planets Inhabited?」
...A lively curiosity, a spirit of emulation,the desire of not being outdone, had the privilegeof giving to the natural vision an unusual powerof penetration...
George Chambers 「The Story of Eclipses」
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