Light shaft between 13+15 Grove St. looking west Shield for tunnel under Beacon Hill for Cambridge connection Shield for tunnel under Beacon HIll for Cambridge connection Shield for tunnel under Beacon Hill for Cambridge Connection Shield for tunnel under Beacon Hill for Cambridge Connection Shield for tunnel under Beacon Hill for Cambridge Connection Shield for tunnel under Beacon Hill for Cambridge Connection Shield for tunnel under Beacon Hill for Cambridge Connection Shield for tunnel under Beacon Hill for Cambridge Connection Shield to be used for tunnel under Beacon Hill for Cambridge Connection Part of shield to be used for tunnel under Beacon Hill Part of shield to be used for tunnel under Beacon Hill Looking south up Grove St. from Phillips St. Southeast corner of yard in rear of #50 Phillips St. Part of shield for construction of Tunnel under Beacon Hill Part of northerly side wall of single arch section of tunnel under Beacon H ill near Station 3+85 Beginning of single arch section of tunnel under Beacon Hill station 3+85 Unfinished northerly side wall of single arch section of tunnel under Beacon Hill Surface occupation at Ss.w. corner of Phillips and Grove St. Part of shield to be used in construction of tunnel under Beacon Hill Part of shield delivered at Phillips and Grove Sts. Part of shield to be used in construction of tunnel under Beacon Hill Looking northwesterly from shaft in Phillips and Grove Sts. Looking northwesterly from shaft in Phillips and Grove Sts. Two arch section under intersection of Phillips and Grove Sts. Surface occupation Phillips St. looking east towards Grove St. Side wall of tunnel in light well between #13 and #15 Grove St. Light well between #13 and #15 Grove St. showing side wall of tunnel Intersection of Grove and Phillips Sts. looking north Intersection of Grove and Phillips Sts. looking north Roof of tunnel in rear of #61 and #63 Phillips St., looking easterly Roof of tunnel in rear of #61 and #63 Phillips St., looking easterly Roof of tunnel in rear of #61 and #63 Phillips St., looking southeasterly Roof tunnel in rear of #13 and #15 Grove St. Brick building with man Entrance to tunnel under Beacon Hill at rear of #13-#15 Grove St. Entrance to tunnel under Beacon Hill at rear of #13-#15 Grove St. South side wall of tunnel across Grove Place looking south Tracks and hoppers on bridge over Phillips St. Tracks and hoppers on bridge over Phillips St. Intersection of Phillips and Grove St. looking east along Phillips St. View from under raised passage way Tunnel under Beacon Hill for Cambridge Connection sta.5+20, shield Beacon Hill tunnel upper deck near shield Beacon Hill tunnel lower deck towards shield Beacon Hill tunnel shield Beacon Hill tunnel upper deck Beacon Hill tunnel lower deck torards shield Inside a tunnel lit with electric light and group of men in the background Shield at sta.8+41