As an integral element of circulation routes through the designed landscape, walk is one of the most common terms in American garden descriptions. Walks were highly varied in their composition, arrangement, and plantings. While widths varied, a narrow walk limited to foot traffic was often called a path, while a broad, straight walk lined with trees was often called an [[avenue]]. Walks were configured in numerous ways and composed of different materials such as brick, shell, gravel, packed dirt, tan (or tan bark), and turf. From most images of walks it is difficult to discern their composition, but contrary to brick paving, which was popular only in colonial revival gardens, textual references appear to indicate that gravel was a surface commonly used. <span id="Forsyth_cite"></span>[[William Forsyth]] in his 1802 treatise recommended sand or sea-coal ashes on a foundation of brick rubble or gravel for building a walk in a [[kitchen garden]]. He noted the ease of maintenance of such surfaces, which were weeded simply by raking ([[#Forsyth|view citation]]). It is interesting to note that despite changing trends in garden styles, treatises remained remarkably consistent in their advice and instruction. Entire passages were frequently borrowed or adapted from earlier publications.