Winnie. Thanks for your assistance. I had wondered how your Kennas and the Hardings reached Port Washinton from Harbour Grace. I think I found out last night -- see http://www.linkstothepast.com/waukesha/newfound2wis.php#top
The 1849 route desribed in the article in the link was by ship from Harbour Grace to New York, then by boat up the Hudson to Albany, then by the Erie Canal to Buffalo, then by ship to Milwaukee and then overland to Port Washington. Note the discussion of cholera in Buffalo. This route avoided the rapids on the St Lawrence upstream from Montreal and Niagara Falls. Tom