Sorry. I missed your reference to Ussher,which i am not familisr with.
I looked it up and your right. Ussher's dates are most likely not correct,according to archeologists. The truth is that a date form around Noah would be impossible due to the impossible lifespans prior to the flood. Archeologists have placed the time of Abraham around 2,000 B.C,which actually coincides with the Bible,according to I Kings reference to 480 years after the Exodus. The 430 years in Egypt is probably not correct,which is not compatable with the four generations. Most other texts say the Israelites were in Egypt 215 years and in Canaan prior to that for 215 years,or 430 years as a stranger n a strange land.
Edited by Tree12, : No reason given.