And please don't forget there are Dutch, the Different names that mean smith in other languages. :) We did have some in the Caribbean-so it gets very confusing if they do not put Jamaica NY, and there are many good sites from Canada as well. And believe it or not, even some from France, and Germany. Extremely difficult to trace, especially around the American Revolution (or should I say the French/Indian wars), as well as Ohio and Indiana histories, Native American Indians taking on the name Smith. ie Don't forget to look at some, altho they are later histories, of US documents regarding citizens of those nations.
There are quite a few Welsh Smiths (who might have come from ancient Scotland-Ecceard Smith-pict). England, there are also many in Warwickshire-religion, Nottinghamshire-High Sheriff, Lincolnshire, Ashton Court, and a good many Lancastrians whether moving or the borders moving to Yorkshire. Feuchtwanger in Proud Destiny mentions a couple of Smiths, as well as some of the Eleanor Hibbett/Jean Plaidy historical novels, but known for factual accuracies (the fiction is the emotion and filling in blanks). Some are tied very closely to Tudor and Stewart (Stuart sp?) houses. And all must faithfully promise not to be in tears of frustration by the time they find out who Erasmus Smith was LOL