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We have extended the membership and determined the 3-D structure of the large(0.19 pc) HH~269 sequence of shocks in the Orion Nebula. All of the componentslie along a track that is highly tilted to the plane-of-the-sky and emerge fromwithin the Orion-S embedded molecular cloud. Their source is probably eitherthe highly obscured mm 9 source associated with a high N2H+ density core (morelikely) or the more distant star COUP 632 (less likely). The former must belocated in the Photon Dominated Region (PDR) underlying the ionized surface ofthe Orion South Cloud, while the latter would be embedded within the cloud. Theflows seem to be episodic, with intervals of 1900 to 2600 years or 700 to 2600years if COUP 632 is the source.

Deciphering the 3-D Orion Nebula-IV: The HH~269 flow emerges from the Orion-S Embedded Molecular Cloud