It is possible that this is the same child as the son called Donald said to have been born in 1858 - is it a transcription error or did the first son of this name die in childbirth?
Sources
"Scotland Births and Baptisms, 1564-1950," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XBML-T96 : 10 February 2018), Donald Sandison, 03 Feb 1850; citing WATTEN,CAITHNESS,SCOTLAND, reference , index based upon data collected by the Genealogical Society of Utah, Salt Lake City; FHL microfilm 990,557.
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