How old was Thomas Boylston Adams when Abigail Adams died?

What was the age (length of time since creation) of Thomas Boylston Adams (September 15, 1772 – March 13, 1832), the third and youngest son of John and Abigail (Smith) Adams at the time Abigail Adams (née Smith; October 28, 1818), the wife of John Adams, who was the second President of the United States, and the mother of John Quincy Adams, the sixth is someone who died on?

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I followed this chain of reasoning:

I know from locally stored knowledge that:
October 28th 1818 is the date of death of Abigail Adams ([fact: ["18324582@trueknowledge.com"]])

September 15th 1772 is the birthdate of Thomas Boylston Adams ([fact: ["144195425@trueknowledge.com"]])

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: 46 years, 1 month and 13 days old is the age of Thomas Boylston Adams

Fact 1 is true at October 28th 1818

By calculation (generator: ["applies_at_timepoint@trueknowledge.com"]) I know that:
Fact 1 is true at October 1818

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: 46 years, 1 month and 13 days old is a age

Fact 1: 46 years, 1 month and 13 days old applies to Thomas Boylston Adams

Fact 1 is true at October 28th 1818

By calculation (generator: ["ismoreaccurate1@trueknowledge.com"]) I know that:
October 28th 1818 is a more accurate version of October 1818

I used the following facts to provide this answer:

October 28th 1818 is the date of death of Abigail Adams

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September 15th 1772 is the birthdate of Thomas Boylston Adams

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