Portion of the L935 dark cloud corresponding to the Gulf of Mexico, on the Hα image from the Subaru telescope taken in 2006. The two 7′  ×  7′ fields (A and B) observed at the University of Hawaii 2.2 m telescope are marked in solid lines. The full 7′  ×  14′ field corresponds to the area shown in Fig. 4. The four fields observed through an H₂ filter at UKIRT are marked with the dashed line squares. The dotted line square marks the JHKL field observed at IRTF, centered on the LkHα 185–188 cluster.