Notes for Walking (the space in between time) is a locative artwork developed for Middle Head National Park and Mosman Art Gallery, NSW for the Sydney Festival, 2013. In Notes for Walking, visitors use their mobile phones to discover a set of short video ‘notes’ as they explore the abandoned naval fortifications on the headland. Thirteen short videos are electronically tagged to features of landscape onsite, asking audiences to contemplate notions of waiting, time and impermanence as they walk. Working with the spectacular intersection of land, sea and sky at Middle Head, and the emerging capacities of augmented reality and location-based technologies, Notes for Walking is an intriguing exploration of a remarkable landscape.