The words “Esto Perpetua” emblazoned upon a stone above the entrance to Grotto Spring declare the prevailing belief that these healing waters would flow forth forever. Early Townspeople discovered the spring under an overhanging rock ledge a short distance from the well known Dairy Spring. Extensive street construction on “The Boulevard” as Spring Street was then called, began in 1890. This necessitated construction of an enclosure of limestone and ornamental stonework encasing Grotto Spring, hand-worked by very skilled stonemasons. Grotto Spring was located only a few steps from the Electric streetcar line. Some of the first Ordinances enacted by city government were to protect the springs for public use in perpetuity. The wooded area on the hillside above and around the spring is delineated by ordinance that appears to be Oak or Sheffield Spring described in Ordinance No 81 dated February 14, 1886. The Sheffield family resided nearby in 1880 and may have operated the original dairy for which the hollow below this site was named.