Conversation so far:
Is Waterloo a place?
Waterloo is a municipality in the province of Walloon Brabant, Belgium.
Was Henry Paget, 1st born in Waterloo?
Henry Paget, 1st Marquess of Anglesey was born in London.
Did Henry Paget, 1st win the Battle of Quatre Bras and the Battle of Waterloo?
The battle of Quatre Bras was an Anglo-allied tactical victory and French strategic victory. The Battle of Waterloo was a Coalition victory.
What happened after Henry Paget, 1st won the battle at Waterloo
Paget was created Marquess of Anglesey on 4 July 1815.
What did Henry Paget, 1st do after his leg was amputated?
Henry Paget, 1st Marquess of Anglesey had an articulated artificial limb fitted.
Was the leg of Henry Paget, 1st put in some kind of museum or something?
Henry Paget's amputated leg became a tourist attraction in the village of Waterloo in Belgium, to which it had been removed and where it was later interred.
Was Henry Paget, 1st able to continue in the military after his leg was amputated?
After Henry Paget, 1st Marquess of Anglesey's leg was amputated he was promoted to full general.

Question: Was he referring to his replacement in this conversation?
Self-contained rewrite: Was Henry Paget, 1szt referring to his replacement when he said I have had a pretty long run. I have been a beau these 47 years and it would not be fair to cut the young men out any longer.?