Oak apple due to the superficial resemblance and the preponderance of the oak marble gall in the wild. Other galls found on oak trees include the oak artichoke gall and the acorn cup gall, but each of these has its own distinctive form. Some common oak-apple-forming species are the "Biorhiza pallida" gall wasp in Europe, "Amphibolips confluenta" in eastern North America, and "Atrusca bella" in western North America. Oak apples may be brownish, yellowish, greenish, pinkish, or reddish. Oak galls have been used in the production of ink since at least the time of the Roman Empire. From the Middle Ages to
HMS Royal Oak (08) scenes of naval action. In 1938, "Royal Oak" returned to the Home Fleet and was made flagship of the Second Battle Squadron based in Portsmouth. On 24 November 1938, she returned the body of the British-born Queen Maud of Norway, who had died in London, to a state funeral in Oslo, accompanied by her husband King Haakon VII. Paying off in December 1938, "Royal Oak" was recommissioned the following June, and in the late summer of 1939 embarked on a short training cruise in the English Channel in preparation for another 30-month tour of the Mediterranean, for which her crew