NewBrunswick"The History of Kings County, Nova Scotia, Heart of the Acadian Land,"...
By Arthur Wentworth Hamilton Eaton
Published 1910  The Salem Press Company (and 1999 Heritage Books)
Google BOOKS
Page 655 (and others) Family Sketches
  "The ELDER family, a family unusually gifted,
was founded in Hants County by Matthew Elder,
who came as a young man from County Donegal, Ireland, to Windsor..."
Browsing in the Google book about Nova Scotia,
I found more about ELDER in Halifax:

   "Matthew ELDER's wife died Oct. 9, 1809 in Halifax, while on a visit to her son James.
  She was buried in St. Paul's burying ground on Pleasant Street, as was also her son James.

Using Google, searched for St. Paul's Burying Ground in Halifax, which found a webpage in Wikipedia:

   "The Old Burying Ground (also known as St. Paul's Church Cemetery) is a historic cemetery in Halifax, Nova Scotia, Canada.
It is located at the intersection of Barrington Street and Spring Garden Road in Downtown Halifax.
It was founded in 1749, the same year as the settlement, as the town's first burial ground….
... "The site steadily declined until the 1980s when it was restored and refurbished by the Old Burying Ground Foundation,
which now maintains the site and employ tour guides to interpret the site in the summer…."

"From May to October each year local citizens and tourists have toured the Ground assisted by a guide, hired each year by the Foundation under the auspices of the Federal or Provincial Summer Student Employment programs."

  "Click here to view the database for markers"

Found one ELDER, looks like Matthew's wife!
Rebecca Elder Burial Date: 1809 - Stone ID: 984 - Mapping ID 2B
The Burying Ground webpage says "photos soon" -- may be old webpage.
So I used Google to search for "Halifax and Old Burying Ground" with photos"
Found some at Trip Advisor.
Browsing more…
Includes review:
Reviewed November 9, 2015
  "What a beautiful cemetery. I walked by several times before making
time to explore and read some of the old gravestones...
this peaceful spot, adjacent to part of the Dalhousie campus and near the Central Library, is the perfect place to take a breather and experience the history of place Halifax is known for."

FINDAGRAVE - Marker photo
Birth: unknown
Death:  Oct., 1809
Old Burying Ground
Halifax County
Nova Scotia, Canada
Created by: LMK
Record added: Jul 27, 2014
Find A Grave Memorial# 133389952

From Google search for:
 "ELDER family" and "NEW BRUNSWICK"

Samuel Elder
Birthdate:     circa March 1831
Birthplace:     Colony of New Brunswick
Death:     Died December 1, 1914 in Queens, New Brunswick, Canada
Place of Burial:     Armstrong's Corner, Petersville Parish, Queens, New Brunswick, Canada
Immediate Family:    
Son of David Elder and Anne Elder
Husband of Margaret Linton Elder
Father of Samuel Opie Elder; Jane Gertrude Lilley and Anne Florence Francis
Brother of Rebecca Wark; David Elder, Jr; Mary Anne Killen; Jane Kennedy; Moses Elder and 2 others

David Elder
Birthdate:     circa 1803
Birthplace:     Upper Burnfoot, Templemore Parish, Donegal, Ireland
Death:     Died December 19, 1842 in Petersville Parish, Queens, Colony of New Brunswick
Place of Burial:     Armstrong's Corner, Queens, Colony of New Brunswick
Managed by:     delMonte Vernon Davis -  updated December 8, 2014
                          "Send message"

About David Elder
  "Recorded 200 acre homestead land grant in Petersville, Q.C., N.B.,
10/17/1848 (PANB film F16333, vol. 34, pg. 18, #4352).
Previously recorded a 200 acre homestead grant in Hampstead, Q.C., N.B. 8/13/1825,
with John Brittain and Thomas Woods (PANB film F16311, vol 7, pg. 217, #1850).
Hampstead Parish formerly included part of what is now Petersville Parish; it is unknown how geographically related David's two homestead grants were."

Findagrave (no photo)
Birth:     Aug. 20, 1827
Queens County
New Brunswick, Canada
Death:     May, 1910
Queens County
New Brunswick, Canada

Family links:
  Elizabeth A. Jackson Elder (1841 - 1927)*
Lyons Cemetery
Queens County
New Brunswick, Canada
Plot: 1459
Created by: SheilaMC
Record added: Jul 12, 2014
Find A Grave Memorial# 132734912
    and others....