U.S. Marine Corps Sgt. David R. Allen, left, a Marine Corps Water Survival Instructor assigned to Marine Wing Headquarters… https://www.rawpixel.com/image/8739481/photo-image-public-domain-peopleFree Image from public domain licenseFerry Street looking East, Easton, Pennsylvania by J R Knecht https://www.rawpixel.com/image/14294400/ferry-street-looking-east-easton-pennsylvania-knechtFree Image from public domain licenseHarbor View, St. John. [New Brunswick, Canada] by J R Woodburn https://www.rawpixel.com/image/14288726/harbor-view-st-john-new-brunswick-canada-woodburnFree Image from public domain licenseThe death of Sir Philip Sidney at the battle of Zutphen: he passes a water-flask to a fellow soldier. Mezzotint by J. Jones… https://www.rawpixel.com/image/14002761/image-horse-cartoon-personFree Image from public domain licenseTaps and dies for cutting screw threads, and a water-tight window: cross-sections, and details. Engraving by J. Cleghorn… https://www.rawpixel.com/image/14001944/image-paper-cross-patternFree Image from public domain licenseHarbor view of St. John, New Brunswick, Canada by J R Woodburn https://www.rawpixel.com/image/14303487/harbor-view-st-john-new-brunswick-canada-woodburnFree Image from public domain license