http://www.colonialwarsct.org/1638_new_haven_plan.htm#mapCheck this out. Look at square seven. Notice how it refers to Richard Mansfield as "Mr.". What I found out about that was there was only one other "Mr.". So I looked that up and found this.
http://www.genealogytoday.com/columns/everyday/040607.htmlmister: In Colonial New England, "Mister" was a term of respect applied to gentleman, office holders and clergy.
I'm willing to bet he was a "gentleman".
Hope this helps!
-Katie Mansfield