It is also possible to give more attention than before to the picture-writing of the aboriginal inhabitants of America beyond the limits of the United States. While the requirements of the acts of Congress establishing the Bureau of Ethnology have been observed by directing main attention to the Indians of North America, there is sufficient notice of Central and South America to justify the present title, in which also the simpler term “picture-writing” is used instead of “pictographs.” Picture-writing is a mode of expressing thoughts or noting facts by marks which at first were confined to the portrayal of natural or artificial objects. It is one distinctive form of thought-writing without reference to sound, gesture language being the other and probably earlier form. Whether remaining purely ideographic, or having become conventional, picture-writing is the direct and durable expression of ideas of which gesture language gives the transient expression. Originally it was not connected with the words of any language. When adopted for syllabaries or alphabets, which is the historical course of its evolution, it ceased to be the immediate and became the secondary expression of the ideas framed in oral speech. The writing common in civilization may properly be styled sound-writing, as it does not directly record thoughts, but presents them indirectly, after they have passed through the phase of sound. The trace of pictographs in alphabets and syllabaries is discussed in the present work under its proper heading so far as is necessary after the voluminous treatises on the topic, and new illustrations are presented. It is sufficient for the present to note that all the varied characters of script and print now current are derived directly or mediately from pictorial representations of objects. Bacon well said that “pictures are dumb histories,” and he might have added that in the crude pictures of antiquity were contained the germs of written words.