appellant has worked for a long time. His appointment, however, being in contravention of the statutory provision was illegal, and, thus, void ab-initio. If his appointment has not been granted approval by the statutory authority, no exception can be taken only because the appellant had worked for a long time. The same by itself, in our opinion, cannot form the basis for obtaining a writ of or in the nature of mandamus; as it is well known that for the said purpose, the writ petitioner must establish a legal right in himself and a correspondent legal duty in the State. {See Food Corporation of India & ors. V. Ashish Kumar Ganguly & ors. [2009 (8) Scale 218] }. Sympathy or sentiments alone, it is well settled, cannot form the basis for issuing a writ of or in the nature of mandamus. { See State of M.P. & Ors. v. Sanjay Kumar Pathak & Ors. [JT 2007 (12) SC 219: (2008) 1 SCC 456] }”