Ah, very nice...can't wait for the rest of the series!
And I believe they're the same Piatt's from Cincinnati as in Bellefontaine:
http://www.heritagepursuit.com/Logan/LoganChapXVII.htmIn the southwest part of the township is a little log chapel belonging to the Catholic Church. It had its origin somewhat as follows: When the Catholics first came to Cincinnati, the property-holders refused to sell them land, but Benjamin M. Piatt, who was a large property-holder then, was less hostile, and notified Bishop Fenwick, that he could have a building site not far from his residence. The intercourse thus opened up between the clergy and the Piatt family, resulted after a while in the conversion of Mrs. Piatt from the Methodist to the Catholic faith. When the Piatt family came to Logan County, Mrs. Piatt persuaded her husband to donate fire acres to the church.Meanwhile, from the Cincinnati Parks webpage:
http://dynamic.cinci-parks.org/cgi-bin/parks.cgi/park_desc?park_id=101Piatt, Cincinnati's first park, was given to the city by brothers John M. and Benjamin M. Piatt in 1817 "for a market space."