Thank you for your reply to Claude, John Garrett!  I, too, will obtain a
copy of that book..In the meantime, while looking for a supplier of it, I
found this article from the "Smithsonian Magazine" which points out the 10
most important maps from that book from their perspective.  Claude, hope
you see this..
http://www.smithsonianmag.com/history-archaeology/George-Washington-and-His-Maps.html

Shirley Cox Schroeder

On Mon, Aug 27, 2012 at 8:27 AM, <[log in to unmask]> wrote:

> >I am working on a theory that my ancestral family may have "sailed" up
> the Potomac and gone overland to the Monongahela River and then down the
> Ohio.  This would have been about 1784-1792.
> >
> >Can someone tell me (during that time period):
> >1.     how far up the Potomac they could have gotten before having to go
> overland?
> >2.     how far up the Monongahela they could have put in to the water?
> >3.     where I might get further information on this?
> >
> >They owned next to nothing so a boat could have been small.
>
>
> -Great Falls in the Potomac would have been a serious obstacle so they
> would have
> had to launch above that and the rocks at Harper's Ferry are another
> blockage point.
> It would have had to be some sort of flat bottomed boat to carry their
> goods and
> small enough to be portaged around rough sections of the river.  The
> Chesapeake and
> Ohio Canal didn't open till 1831 so they couldn't have used that means.
>
> You should look at 'George Washington's America: A Biography Through His
> Maps' by
> Barnet Scheter, published Nov. 2010 by Walker and Co. for an overview of
> the
> transportation net in the 1750s-60s to get an idea of the terrain, rivers,
> settlements,
> etc. in the areas you are interested in.
>
>
> John Garrett
>
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