Callister v Heyder - [1940] NZLR 439

Water — Watercourse — Riparian Rights — Stream issuing from Gorge spilling out into Swampy Ground — Owner of Land by Groyne diverting Part of Water to Water-race — Stream subsequently extended by Artificial Means — Sudden and perceptible Changes of Course — Continuous and defined but not permanent Course since 1934 — Original Right of Owner to divert to Water-race — Whether Proprietor of Land reached by Stream as subsequently extended had Riparian Rights over its Course from the Gorge to his Land.