How old was Reginald Nevill, 2nd Marquess of Abergavenny when William Nevill died?

What was the age (length of time since creation) of Reginald William Bransby Nevill, 2nd Marquess of Abergavenny JP (4 March 1853 - 13 October 1927), styled Viscount Nevill between 1868 and 1876 and Earl of Lewes between 1876 and 1915, the British peer at the time William Nevill, 1st Marquess of Abergavenny KG, MVO (16 September 1826 - 12 December 1915), styled Viscount Neville between 1845 and 1868 and known as The Earl of Abergavenny between 1868 and 1876, the British peer is someone who died on?

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I followed this chain of reasoning:

I know from locally stored knowledge that:
December 12th 1915 is the date of death of William Nevill ([fact: ["18306754@trueknowledge.com"]])

March 4th 1853 is the birthdate of Reginald Nevill, 2nd Marquess of Abergavenny ([fact: ["1097567402@trueknowledge.com"]])

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: 62 years, 9 months and 8 days old is the age of Reginald Nevill, 2nd Marquess of Abergavenny

Fact 1 is true at December 12th 1915

By calculation (generator: ["applies_at_timepoint@trueknowledge.com"]) I know that:
Fact 1 is true at December 1915

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: 62 years, 9 months and 8 days old is a age

Fact 1: 62 years, 9 months and 8 days old applies to Reginald Nevill, 2nd Marquess of Abergavenny

Fact 1 is true at December 12th 1915

I know from locally stored knowledge that:
1853 is the birthdate of Reginald Nevill, 2nd Marquess of Abergavenny ([fact: ["1097567390@trueknowledge.com"]])

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: between 62 years and 0 months and 62 years and 11 months old is the age of Reginald Nevill, 2nd Marquess of Abergavenny

Fact 1 is true at December 12th 1915

By calculation (generator: ["applies_at_timepoint@trueknowledge.com"]) I know that:
Fact 1 is true at December 1915

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: between 62 years and 0 months and 62 years and 11 months old is a age

Fact 1: between 62 years and 0 months and 62 years and 11 months old applies to Reginald Nevill, 2nd Marquess of Abergavenny

Fact 1 is true at December 12th 1915

By calculation (generator: ["ismoreaccurate1@trueknowledge.com"]) I know that:
December 12th 1915 is a more accurate version of December 1915

I used the following facts to provide this answer:

December 12th 1915 is the date of death of William Nevill

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March 4th 1853 is the birthdate of Reginald Nevill, 2nd Marquess of Abergavenny

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1853 is the birthdate of Reginald Nevill, 2nd Marquess of Abergavenny

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