President Lincoln, United States Headquarters, Army of the Potomac, near Antietam by Alexander Gardner https://www.rawpixel.com/image/14262790/photo-image-hearts-face-handsFree Image from public domain licenseGroup of people planning on robbing criminal https://www.rawpixel.com/image/50109/premium-photo-image-crime-bills-closeupView licenseGroup of people planning on robbing criminal https://www.rawpixel.com/image/50004/premium-photo-image-crime-criminal-espionageView licenseGroup of people planning on robbing criminal https://www.rawpixel.com/image/50000/premium-photo-image-crime-criminal-espionageView licenseLe Chevalier D'Éon, a man who passed as a woman: shown half in woman's, half in man's attire. Engraving. https://www.rawpixel.com/image/13963504/image-paper-cartoon-faceFree Image from public domain licenseGroup of people planning on robbing criminal https://www.rawpixel.com/image/49974/premium-photo-image-crime-criminal-espionageView licenseGroup of people planning on robbing criminal https://www.rawpixel.com/image/50028/premium-photo-image-crime-criminal-espionageView licenseGroup of people planning on robbing criminal https://www.rawpixel.com/image/50131/premium-photo-image-crime-criminal-espionageView licensePurple balloon letters forming the word illegal https://www.rawpixel.com/image/459222/image-rawpixelcomView licenseSpying quadcopter: espionage and observation, location unknown, 31 July 2014. https://www.rawpixel.com/image/6113588/photo-image-public-domain-technology-skyFree Image from public domain licenseLe Chevalier D'Éon, a man who passed as a woman. Stipple engraving by R. Cooper, 1821. https://www.rawpixel.com/image/13978961/image-cartoon-face-personFree Image from public domain licenseLe Chevalier D'Éon, a man who passed as a woman. Stipple engraving by T. Chambers after R. Cosway, 1787. https://www.rawpixel.com/image/13989836/image-face-person-artFree Image from public domain licenseTwo scenes of Le Chevalier D'Éon fencing at Angelo's Fencing Academy. Reproductions of watercolours, 1904, by T. Rowlandson. https://www.rawpixel.com/image/14007635/image-cartoon-people-watercoloursFree Image from public domain license