No longer having a need to maintain a subsidiary coinciding with the territory of that railway firm, Greyhound next reorganized some of its routes in the Midwest and the Northeast, seeking a more efficient operation. During 1948 The Greyhound Corporation merged the Illinois GL into the main (second) Central GL. The routes involved, all in Illinois except into three cities on state lines, were those between Chicago and Effingham (in Illinois and on the way to Memphis in Tennessee and New Orleans in Louisiana), between Chicago and Saint Louis (in Missouri) via Springfield (in Illinois), between Chicago and Louisiana (not the state of Louisiana but rather the city of Louisiana in the state of Missouri and on a shortcut, bypassing Saint Louis, to Kansas City, on the state line between Kansas and Missouri), between Springfield and Champaign (both in Illinois), and between Davenport (in Iowa) and both Champlain and Springfield. On the last day of 1948, Greyhound converted the main (second) Central GL from a subsidiary into a division of The Greyhound Corporation, thus ending the separate existence of the CGL as a corporate entity – after the completion of reacquiring the stock in the CGL which the NYC (railway) System had held. In 1954 Greyhound merged the main (second) Central GL (along with the Capitol GL and the Richmond GL) into the Pennsylvania GL, then in the next year, 1955, the enlarged Pennsylvania GL (along with the New England GL) became redesignated as the Eastern Division of The Greyhound Corporation [called also the (second) Eastern GL], the first of the four huge new divisions (along with Southern, Western, and another Central). Thus ended the second Central GL, and thus began the second Eastern GL. About the end of 1955 Greyhound merged the CGL of New York into the new Eastern Division [the (second) Eastern GL]. Thus ended the fourth Central GL. Through-coaches on through-routes The main (second) CGL and the CGL of New York ran a large number of through-coaches along their own routes, including those between Chicago and Boston, Chicago and New York City, and Montréal and New York City. At first they took part in relatively few pool interlined through-routes in cooperation with other Greyhound operating companies – those between Montréal and Washington, DC, and between Syracuse and Philadelphia [both with the Pennsylvania GL], between Cleveland and Miami (in Florida) [with the Atlantic GL and the Florida