John Telfer, who was appointed the Crown Land Agent for this area in 1840, bought and moved to Leith in 1846 when the settling of the community began.

At one time a pier capable of serving sailing ships and schooners existed on the northeast side of the mouth of Bothwells Creek.

November storms, winter ice and two ship disasters at the dock weakened it, eventually making it a dangerous structure which the townsfolk tore down after Ainslie's death.

All that remains in the water are a collection of old wooden pilings, serving principally as perches for waterfowl and an obstacle to pleasure boaters.

A superior harbour in the city of Owen Sound, at the end of the inlet, eventually led to the demise of Leith as a commercial port.

The old Leith Church is the site of the grave of Tom Thomson, a noted Canadian landscape painter who died in mysterious circumstances at Canoe Lake in Algonquin Park in 1917.

Thomson was a friend of the Group of Seven, famous landscape painters many of whose works are on permanent display at the McMichael Canadian Art Collection in Kleinburg, Ontario.

Mail began to arrive in Leith in 1853, and was delivered from Sydenham (Owen Sound) post office by steamboat bi-weekly to Ainslie Wharf.

Since 1988 a species native to Asia, zebra mussels (Dreissena polymorpha), have invaded the Great Lakes, and the Owen Sound area has not been spared.

An area on the Georgian Bay water between Owen Sound and Leith, simply marked with a green buoy, is known by local salmon and trout anglers as "Thomson's Hole".

In 1997, a stained glass window designed by Ellen Simon entitled "Nativity Scene" circa 1954 in the United Church in Leith was illustrated on the U.S.-rate Canada Postage stamp in the Christmas series.