Here is what I think the corrected entry says:-
With reference to Entry No. 504 in the Register Book of Births for the year 1897, insert the following note on the authority of a Certificate in the Form of Schedule F?
In an action relating to the paternity of a male child born 12th March 1897, at the instance of Poor? Helen Reid, Millworker, 71 West North Street, Aberdeen against William Lennan, Machineman, 119? Union Grove, Aberdeen The Sheriff of Aberdeen, Kincardine and Banff at Aberdeen on the 8th day of October 1897, found that the said child was the illegitimate child of the said Helen Reid and William Lennan.
October 12th 1897 at Aberdeen – Charles Stronnah? Registrar