All the records include the following;
Shipping Manifest
Death Certificate
Marriage Certificate
First Child's death certificate (George)
All of the above, except shipping manifest, state Aberdeen, Scotland as Sylvinia's place of birth.
The only witnesses on the marriage certificate are the officiating minister, Alexander Hay, as well as Hugh Lawbie Morton and David Watson. I've checked out Morton and Watson, they were not relatives or friends of Sylvinia or her husband.