Just a thought. Given Donald's birth shows on the 7 June on this parish entry, could the note simply be a correction on this date to the 8th?
This looks to be the birth entry on the statutory register:
DONALD MC DONALD Birth: 08 JUN 1857 Aharacle, Argyll
Parents: ALLAN MC DONALD and SALLY MACPHERSON
But other than seeing the date 8th as AR mentions, the rest of it is double dutch to me

Monica