Mystery Artist(s) 45 – Ship Roman and Bark Arrow

Mark writes:

 

“I just came across your website scrimshaw.com and wonder if you may be able to help identify the following two whale’s teeth scrimshaw scrimshanders. The boats in question are:
 
Ship Roman (No initials but there is history on the Ship Roman)Ship Roman Scrimshaw pics 3 & 4Ship Roman scrimshaw, pics 1 & 2
 
 
 
 
 
Bark Arrow (Has the initials JA however I can find no history on the Bark)
Mystery Artist(s) 45, pics 1 &2
The Bark Arrow, Mystery Artist(s) 45, pics 3 & 4I have tested the ivory with a hot pin and
both passed.
 
Hope you can help
 
Many thanks,
Mark (UK)
 
 

 
By the looks of the pics and the scrimshaw they appear authentic, though I haven’t found any information on them so far.  Several replicas of the ship Roman, though not with this exact scrimshaw. 
The Bark Arrow does have some information online (http://www.cah.utexas.edu/db/dmr/gallery_lg.php?s=84&gallery=exxonmobil).  Searching for “Bark Arrow” with quotes reveals a lot of links.
 
Anyone familiar with the pieces or the style?  Feel free to comment below.