While giving weight to these public and private considerations, the courts will require that the defendants make a prompt and reasonable start toward full compliance with our May 17, 1954, ruling. Once such a start has been made, the courts may find that additional time is necessary to carry out the ruling in an effective manner. The burden rests upon the defendants to establish that such time is necessary in the public interest and is consistent with good faith compliance at the earliest practicable date. To that end, the courts may consider problems related to administration, arising from the physical condition of the school plant, the school transportation system, personnel, revision of school districts and attendance areas into compact units to achieve a system of determining admission to the public schools on a nonracial basis, and revision of local laws and regulations which may be necessary in solving the foregoing problems. They will also consider the adequacy of any plans the defendants may propose to meet these problems and to effectuate a transition to a racially nondiscriminatory school system. During this period of transition, the courts will retain jurisdiction of these cases. The judgments below, except that in the Delaware case, are accordingly reversed and the cases are remanded to the District Courts to take such proceedings and enter such orders and decrees consistent with this opinion as are necessary and proper to admit to public schools on a racially nondiscriminatory basis with all deliberate speed the parties to these cases. The judgment in the Delaware case--ordering the immediate admission of the plaintiffs to schools previously attended only by white children--is affirmed on the basis of the principles stated in our May 17, 1954, opinion, but the case is remanded to the Supreme Court of Delaware for such further proceedings as that Court may deem necessary in light of this opinion. _It is so ordered._ A BIBLIOGRAPHICAL NOTE There stands in the Grove of Academe, or so I have often imagined, a certain idolatrous image. It is a crane-like creature with italic wings, the great god _Ibid._, and before it, strutting on their tiny six-point feet, the pedant peacocks daily make obeisance. They look up, _supra_, and down _infra_, and spreading their tails with asterisk eyes, they march with robed scholars to lay garlands of _op. cit._ upon the ritual shrine.