Aged 30 at marriage in 1853.

Aged 20 when he jpoined the RIC on 21 June 1842.

Was still alive when he was pensioned out of the RIC on 1st July 1868 after serving for 25 years and 11 months.

BB found this:
Name: William Makey
Registration District: Ballymoney
Event Type: DEATHS
Registration Quarter and Year: 1874
Estimated Birth Year: 1824
Age (at Death): 50
Mother's Maiden Name:
Film Number: 101587
Volume Number: 16
Page Number: 117
Digital Folder Number: 4200219
Image Number: 00158
Collection: Ireland, Civil Registration Indexes, 1845-1958

This must be him:
Church Burial Record
Name:    William    MacKey        
Date of Death:    -Jan-1874Dec    
Age:            
Parish / District:    Finvoy    
Address:    Ballaghbeddy        
County:    Co. Antrim
Status:            
Denomination:    Church Of Ireland
Occupation:            
Sex:        
Graveyard        Informant    
Graveyard:            Relationship:    
Parish:            Name:        
County:            Address:    

Name    WILLIAM MACKEY
Year of Death    1874
Group Registration ID    N/R
SR District/Reg Area    Dublin South
Deceased Age at Death    1
Returns Year    1874
Returns Quarter    1
Returns Volume No    2
Returns Page No    566    
Ballymoney, Dirraw; 30 Nov 1874, Newbuilding; William McKay; Male; Widower; 50; Police Pensioner; Tumour on stomach, Seven weeks, Uncertified; James Boyd, PAD, Maddykeel

Question: Why does the Church Burial record give his address as Bellaghbeddy when the Civil Death Record shows "Newbuilding"?  The Griffiths Valuation DOES show a New Buildings nearby but it is the alternative name for the townland of Maddydoo Lower, which is  four townlands south of Ballaghebeddy.  James Boyd is his wife's brother who DID live at Bellaghbeddy.