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    Archive NumberTitleLevelDescriptionMediumImagesArchive Number6416596Title960085_15 - Investigators' PhotographsLevelItemDescriptionOld workings uncovered by modern excavation.MediumPhoto.ImagesnArchive Number6416597Title960085_16 - Investigators' PhotographsLevelItemDescriptionDetail of old workings uncovered by modern excavation.MediumPhoto.ImagesnArchive Number6416598Title960085_17 - Investigators' PhotographsLevelItemDescriptionExcavation in progress.MediumPhoto.ImagesnArchive Number6416599Title960085_18 - Investigators' PhotographsLevelItemDescriptionExcavation in progress.MediumPhoto.ImagesnArchive Number6416600Title960085_19 - Investigators' PhotographsLevelItemDescriptionOld tunnel uncovered by modern excavation.MediumPhoto.ImagesnArchive Number6416601Title960085_20 - Investigators' PhotographsLevelItemDescriptionOld tunnel uncovered by modern excavation.MediumPhoto.ImagesnArchive Number6416602Title960085_21 - Investigators' PhotographsLevelItemDescriptionDetail of old workings uncovered by modern excavation..MediumPhoto.ImagesnArchive Number6416603Title960085_22 - Investigators' PhotographsLevelItemDescriptionDetail of old workings uncovered by modern excavation..MediumPhoto.ImagesnArchive Number6416604Title960085_23 - Investigators' PhotographsLevelItemDescriptionOld tunnel uncovered by modern excavation.MediumPhoto.ImagesnArchive Number6416605Title960085_24 - Investigators' PhotographsLevelItemDescriptionOld tunnel uncovered by modern excavation.MediumPhoto.Imagesn