black smith-helper from May 1980 to December 1984. Ex.A-2 is the office copy of notice issued by the plaintiff to the defendants to regularize his services. Exs.A-3 and A-4 are the postal acknowledgements of the said notice. Ex.A-7 is the copy of GO./Ms.No.1458, Revenue (Endt.III) Department, issued by the Government of Andhra Pradesh regularizing the services of NMRs, who have been working in TTD from 01-7-1975 to 31-12-1975. Ex.A6 is the proceedings issued by the first defendant in ROC.No.B5/51101/02 issued by Deputy Executive Officer, TTD Tirupati, under which the services of NMRs working from 01-7-1975 to 31-12-1980 have been regularized. Ex.A8 is the G.O.Ms.No. 296, Revenue (Endt./III) Department, dated 15-4-1988 issued by the Government of Andhra Pradesh under which the services of NMRs/casual labourers etc., who have been working in TTD Tirupati from 01-1-1975 to 31-3-1994 have been regularized. Ex.A-9 is the proceedings in ROC.No.B5-20447/91 dated 01-8-1991 issued by the first defendant under which the services of NMRs/casual labourers etc., who have been working in TTD Tirupati from 01-4-1984 to 31-3-1984 were regularized. Ex.A-10 is the medical aid identity card issued by TTD Tirupati to PW-1 and the said document shows that PW-1 is working as helper in TTD.