Mr. Armstrong found seven crude clay sculptures, depicting faces, etched onto the walls; historians, noting the abolitionist activity of the Syracuse church, surmised that they were made by escaping slaves.

Yet her own grave is lost to memory, jumbled and forgotten with the rest of the slave remains - somewhere, historians surmise, beneath what is now a Hampton Inn motel.

Archeologists and historians surmise they may have outgrown environmental resources, or encountered more warfare from other cultures, but do not know for sure.

Some historians have surmised that it was over 60 degrees when George Washington took the oath for the second time, on March 4, 1793, in Philadelphia.

Some historians surmise that everything was destroyed at the time of the Great Flood - if there ever was such an event.

Another historian has surmised:

Some historians surmise that Álvar Núñez Cabeza de Vaca traveled through the area after his 1528 shipwreck.

Previously, historians have surmised that the corpses could have been created by injecting the hardening substances directly into the veins of living subjects.

Only decades later did historians surmise the likely origin of the plane.