This link has a biography of William Roberson; I suspect the
photograph is more likely of his son, though:<p>
<a href="http://shadybanks.net/Wise2/williamrobersonBIO.html">
http://shadybanks.net/Wise2/williamrobersonBIO.html</a>
<p>

<hr>

<p>

This link has a transcription of the immigrant ship register, and
further information from another William Roberson descendant:<p>

<a href="http://istg.rootsweb.com/1700/albion740307.html">
http://istg.rootsweb.com/1700/albion740307.html</a>

<p>

<hr>

<p>

Who were Delilah Ritchie's parents?  Was Mary Wilson her mother?
Is Delilah descended from the Caldwell's?
Might want to check out book "Threads of Ancestors: Telford-Ritchie-Mize"
by Lelia Ritchie and Jessie Mize.  It supposedly has a rather complete
account of the descendants of Jane Caldwell Richey.