A museum label gives a range of dates, while the next line names a dynasty. It is tempting to choose the middle year and move on. That creates a precision the record did not offer. A few simple habits keep the chronology readable without sharpening it artificially.
Keep the range intact
In BCE dating, larger year numbers refer to earlier years. A range from 1850 to 1640 BCE runs forward through time from the larger number to the smaller. Write “approximately” when the source does, and preserve any uncertainty marker.
As a purely numerical exercise, 1850 minus 1640 is 210. That difference describes the span between the endpoints; it does not show that an individual object was used for 210 years. Nor does the midpoint prove its manufacture date.
Separate the dates on the page
A record can contain several kinds of dates: estimated manufacture, excavation, acquisition and publication. List them under different headings. The year an institution acquired an object is not the year it was made.
For a hypothetical example, an object dated to a broad ancient range might have entered a collection in a modern year. These facts answer different questions about its history. Do not merge them into one timeline event.
Use historical labels at the source’s level of detail
If the record offers a period and a dynasty range, retain its wording rather than narrowing the attribution through guesswork. Consult the museum’s chronology when you need to understand how the labels relate.
You can practise with the scarab discussed in our close-reading exercise. Write one sentence about its estimated date and another about its collection record. Keeping those sentences separate is a small change that prevents a surprisingly large number of confusing historical summaries.