“With the appointment of the first candidate for the only post in respect of which the consideration came to be made and select panel prepared, the panel ceased to exist and has outlived its utility and, at any rate, no one else in the panel can legitimately contend that he should have been offered appointment either in the vacancy arising on account of the subsequent resignation of the person appointed from the panel or any other vacancies arising subsequently. The circular order dated 22.03.1957, in our view, relates to select panels prepared by the Public Service Commission and not a panel of the nature under consideration. That apart, even as per the circular orders as also the decision relied upon for the first respondent, no claim can be asserted and countenanced for appointment after the expiry of six months. We find no rhyme or reason for such a claim to be enforced before courts, leave alone there being any legally protected right in the first respondent to get appointed to any vacancy arising subsequently, when somebody else was appointed by the process of promotion taking into account his experience and needs as well as administrative exigencies”.