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We present spectrograms of the faint V -drop galaxy pair HDF 3-951. 1 and (V 606 \ 28. 1, I 814 \ 25. 6) HDF 3-951. 2 obtained at the Keck II Telescope. In a recent study, Ferna ndez-Soto, Lanzetta, our integrated spectrograms z ph \ 5. 28 ~0. 41 `0. 34 show a large and abrupt discontinuity near 7710 ⁵ This break is almost certainly due to the Lya A. forest because its amplitude 95% condence limit) exceeds any discontinuities (1 [ f l short/f l long [ 0. 87, observed in stellar or galactic rest-frame optical spectra. The resulting absorption break redshift is z \ 5. 34 ⁰. 01. Optical/near-IR photometry from the HDF yields an exceptionally red (V 606 [ I 814
Spinrad et al. (Tue,) studied this question.