Mansion House and Survey Tree

Mansion House and Survey Tree is a Michigan historical marker in Grosse Ile, Wayne County, dedicated 1964.

20818 East River Road, Grosse Ile

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Here, on high ground near the aged maple, an identification point in old surveys, stood the Mansion House built by William Macomb in 1783-84. He died in 1796 leaving Grosse Ile to his three sons. Michigan’s governor William Hull and British lieutenant colonel James Grant met here September 12, 1807, to discuss border problems. William Macomb II lived here from 1809 to 1813 when the British ordered him out of the territory. His wife and infant son fled in November 1813 when Indians burned the house.

Maps this old were drawn largely by eye, so places on them can sit miles from where they really are. The pin is ours and marks the marker's location today.

TodayHistorical map

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

Historical maps covering this location

1778 · The Western Parts of Virginia, Pennsylvania, Maryland and North Carolina. (David Rumsey Map Collection, Stanford Libraries)
1804 · Ohio. (David Rumsey Map Collection, Stanford Libraries)
1812 · Ohio. (David Rumsey Map Collection, Stanford Libraries)
1815 · Map of Detroit River and Adjacent Country. (David Rumsey Map Collection, Stanford Libraries)
1844 · Chart Of Detroit River, From Lake Erie To Lake St. Slair (David Rumsey Map Collection, Stanford Libraries)

The Western Parts of Virginia, Pennsylvania, Maryland and North Carolina, 1778, covering the location of Mansion House and Survey Tree, with a pin at the marker's coordinates — The Western Parts of Virginia, Pennsylvania, Maryland and North Carolina, 1778, covering this location. David Rumsey Map Collection, Stanford Libraries. The pin is ours, placed from the marker's coordinates.

Example

For example, one family's tree showed the Articles of Confederation marker in Pennsylvania standing under a mile from where William Gabby lived in the 1760s.

What that marker records spans 1777 to 1789, overlapping William Gabby's years there.

From one family's 77-marker roster

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Marker data: Michigan History Center
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