Songlines is based upon a pen-drawn script drawn by Michael Harvey to illustrate a poem by Johannes Thurman.

The expressive and rough-edged letterforms of Songlines do not have any lowercase characters. Instead, alternative uppercase characters occupy their positions. By using a mixture of upper-case and lowercase characters, text can be given a lively and vigorous character. For example, the two versions of L are designed to overlap and interact whichever way round they are used.