tokens: ACKNOWLEDGEMENTS This work was supported in part by the bequest of William Herschel Womble in support of astronomy at the University of Denver. JG thanks the University of Denver Undergraduate Research Center for a Partners in Scholarship (PinS) grant, and the Native American Scholarship fund that helped his efforts in this research. An earlier version of this paper appeared as https://arxiv.org/abs/1612.05287 . The authors are grateful to the Astronomical Research Consortium (ARC) that operates the Apache Point Observatory 3.5 m telescopes and its ARCES and TripleSpec instruments that provided the bulk of the data reported in this paper. We thank Matthew Muterspaugh (Tennessee State University) for access to late-eclipse time-series data generated by Joel Eaton with their Automated Spectroscopy Telescope (AST), review of which led us to re-examine the ARCES data during third-contact (see section 3.4: Details of Stream Appearance). We also want to acknowledge observers and APO programme leaders including Alaina Bradley, Jack Dembicky, Suzanne Hawley, Joseph Huehnerhoff, Russet McMillan, Sarah Schmidt, Nicholas Ule, Donald G. York, George Wallerstein, the APO staff, and others for their contributions to the ARCES and TripleSpec data collection process. We appreciate helpful comments from the reviewer and editor.
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