sentences:  In 1955 the building doubled in size with the opening of a "Texas-size" major addition along Main between St Paul and Harwood designed by Thomas, Jameson & Merrill.This addition matched the original building in height, depth and building materials, although the façade was windowless and featured a large cartouche and prominent signage.The addition also boasted the first complete escalator service for a building of its size in the Southwest and the largest plate glass windows at street level.