OBIETONBARA OWUPELE DANIEL-KALIO, J.C.A. (Delivering the Leading Judgment): The appeal here is against the judgment of the National Industrial Court (the lower Court) delivered on 30/10/2014 in a dispute over the entitlement of the Respondent in respect of his engagement as a Senior lecturer in the University of Lagos (the Appellant). The facts of the case presented by the Respondent as the Plaintiff at the lower Court in brief, are as follows: The Respondent, a Senior Lecturer in Economics at the University of Ibadan decided to spend his one year sabbatical leave in the academic year 2005/2006 as a Visiting Senior Lecturer at the University of Lagos (the Appellant). He was offered an appointment by the Appellant to serve as a Visiting Senior Lecturer by a letter dated 13/2/2006 for a period of one year. He accepted the offer. At the expiration of that offer period, the appointment was extended. At the expiration of his sabbatical leave, the Respondent resumed his regular work as a Se…