The development of the Gulf ports more recently, together with the situation respecting rate wars on export grain, is still further indicated by the chart. When New Orleans in 1891 considerably increased its business through the activities of the Illinois Central Railroad, it speedily developed that climatic conditions led to saturation of the grain with moisture in the vessels' holds. This fact, together with other difficulties, discouraged progress. But, for a time, with the revival of foreign commerce in 1897, both the Gulf and Atlantic ports shared in the greatly increased business. Galveston had now come into the field; and at times surpassed New Orleans in importance by virtue of the development of wheat fields in the Southwest. But the overweening ambition of these Gulf ports, threatening as they did the supremacy of New York, led to intense rivalry. All the lines to the Gulf became finally pitted against all the trunk lines serving the Atlantic seaboard. The advantage for two or three years seemed to lie with the southern lines; and, as the chart indicates, in 1903-1904 grain exports through New Orleans and Galveston actually exceeded those of any other ports. After the utter collapse of export business in 1905, trouble once more threatened to break out; but it was fortunately averted by a compromise effected in 1906. The Gulf lines on through freight demanded a substantial differential to offset certain disabilities, such as the longer haul, poorer service and climatic damage to which they were exposed. The trunk lines successfully met this contention in part, and finally brought about a peaceful settlement of the difficulty. Under this arrangement of a small differential in favor of the Gulf, New York, as the chart shows, has once more resumed its preëminence as compared with the rest of the country. But of late the ever-lessening volume of surplus American grain for export to Europe[19] has rendered the question of far less importance than at one time it threatened to assume.