An exhibition of historical photographs in New Zealand has launched something of a sleuthing effort to identify the subject of one of the show’s many compelling images: a young girl, apparently seeing an escalator for the first time, captured on film licking the moving stairs’ handrail. The 1970 photo was taken by noted photographer Max Oettli, a Swiss-born longtime resident of New Zealand whose iconic images are part of a show called “The New Photography — Life in the ’60s and ’70s” on display through October 13 at Wellington’s Te Papa Museum. Athol McCredie, a curator at the museum, told the NZ Herald that Oettli captured the image inside a department store that had new escalators. “To a child who had never seen an escalator before, this belt (handrail) might have looked like a giant licorice strap,” McCreadie said.

Then again, who knows what goes through the mind of child? If she comes forward, maybe we’ll find out.