Possible death for mother Agnes Adamson/Smith in Peebles in 1883 at the age of 81. Worth viewing on SP to let you confirm her parents' names.
Charles' brother Robert looks to have headed off to Australia
www.wikitree.com/wiki/Smith-147826Sister Margaret you have details of her from that family tree that you could follow up and confirm.
Possible entry for Agnes with daughter Janet in 1881:
Charles Stone 43 b. Prestonpans, Haddingtonshire (can't make out his occupation)
Janet Stone 45 b. Atholstoneford, Haddingtonshire
Agnes Smith 79 mother in law b. Whitingham, Haddingtonshire
George Stone 9
Janet Stone 6
Address: Cross Street, Peebles
Family name is Storie rather than Stone. Mum Agnes shows as living with them in 1871 in Longniddry Station, Gladsmuir. The original image would help. Their marriage here on the index
www.familysearch.org/ark:/61903/1:1:XTR2-652 (original cert on SP).
Monica