His baptism:

First name(s)           John Edward
Last name               Powys
Birth year              1857
Birth date              21 Sep 1857
Baptism year            1857
Baptism date            18 Nov 1857
Place                   Madras,Christ Church
Presidency              Madras
Father's first name(s)  Robert Horace
Father's last name      Powys
Mother's first name(s)  Ellen Elizabeth
Archive reference       N-2-38
Folio                   505
Catalogue descriptions  Parish register transcripts from the Presidency of Madras
Record set              British India Office births & baptisms
_________________

There was a later John Edward Powys, born 1918 in India who shot himself and died in Durbar, South Africe on 13th Sept 1963.  I wonder if he had any connection to this John Edward?  Details on the death certificate on the FamilySearch site.
_________________

His death in South Africa from an image of a Death Registration page:

“Death in the District of Durban during the Month September 1923, page 16
“. . . .
“No:                   568
“When dies:            13th Septemberf 1923
“Where died:           Clairwood
“Name:                 John Edward Powys
“Birth place:          India
“Sex:                  M
“Race:                 E
“Age:                  65 years
“Occupation:           Clerk
“Condition:            Unknown
“Cause of Death:       Gunshot wounds of head
“Duration of disease:  Unknown
“By whom Certified:    Dr H Graham.
“Place of burial:      C of E Cemetery, Durban
“Informant Sig:        C Laviopiene
“do Designation:       Magistrate holding enquiry
“do Residence:         Durban
“When registered:      22nd September 1923
“Remarks:              Suicide - shot himself with a revolver

“I, C Laviopiene of Durban following the occupation of Magistrate holding enquiry do solemnly “   declare that the foregoing information is true to the best of my knowledge and belief.

“Declared before m this 22nd day of September 1923 at Durban,
“   R Kinman,  Dep Registrar for the District of Durban.
___________________

His “Death Notice” (for probate):

1. Name:                John Edward Powys
2. Birth, Nationality:  India, English
3. Parents:             Father: Robert Horace Powys (deceased)
                         Mother: Ellen Elizabeth Powys (deceased)
4. Age:                 66
5. Occupation:          Clerk
6. Residence:           Clairwood
7. Condition:           Unmarried
8. Death date:          Thirteenth September 1923
9. Death place:         at Brothers, W.O.Powys ‘ house, Clair Road, Clairwood, Durban
10. Children:            None
    Brothers & sisters:  1. Mrs Mary Augusta Mathers (born Powys) 83 Bishopsgate, London E.C.2
                         2. Robert Vernon Powys, P.O. Pretoria
                         3. Charles Horace Lilford Powys, ℅ H.L. Powys, Sea View, Natal
                         4. Henry Littleton Powys, Sea View, Natal
                         5. Wilfred Owen Powys, Clairwood, Natal
11. Moveable property:   Inventory Nos 1/3 in possession of Sgt Jones
12. Immoveable items:    Don’t know
13. Effects:             Over £300
14. Will:                Yes

Dated at Clairwood
the 29th day of September 1923, W.O.Powys, Brother at place of death
_______________________

In 1923 they were named as a sibling of John Edward Powys for the purposes of executing his will.
_______________________