XV/4 In a welter of fire Ser Brunetto races away across the plain. The figure is from a watercolour that I made from one of Muybridge's indispensable photo sequences from The Human Figure in Motion (cf. Canto V/3). Dante's teacher is here seen as if heading for the cloth of green mentioned at the end of the Canto as the prize in a foot-race (in which indeed the runners are naked). The green echoes the shape once again of the lawn of a Folly for Wisdom (cf. Canto IV/1) to show the immortality as poet and savant to which Ser Brunetto seems to aspire. -- Source of annotation: Marvin or Ruth Sackner.