Hi Doverrog
On one hand, Scottish BMD
certificates contain much much more information than the English ones! On the other hand, Scottish Civil Registration did not begin until 1855, so prior to that you have only the OPR's (Old Parish Records) baptisms, burials etc..
On one foot, you have online "instant" access to Scotlands People from where (for a fee) you can download images of Certificates after 1855 and OPR's pre 1855, and WIlls/Admons up to 1901 too. On the other foot, SP does not have any death/burial records online pre-1855.
Have a good browse of Scotlands People (SP) to see what is on offer.
http://www.scotlandspeople.gov.uk/Registration is free, at which stage you can at least login and search the indexes to try pinpoint what you are looking for. SP is great value for money if you are finding what you want, and can easily obtain the documents but it can quickly turn into an expensive excercise (especially with Census records). Smart searching of indexes prior to payment is highly recommended. Rootschat has a lot of helpful info on Scottish genealogy - generally, and county by county.
To the McDOUGALLS:1851: Galashiels, SelkirkshireRef: Parish 775, ED 1, pg 19
Address: High Street Old Town No 13
Head: George McDOUGALL 37, Surgeon Edin University, b Blackburn, Lesmahagow?
Wife: Christina McDOUGALL 36, In Practice?, b Galashiels, Selkirk
Son: John A McDOUGALL 6, b Galashiels, Selkirk
Son: Alexander McDOUGALL 4, b Galashiels, Selkirk
Son: George J McDOUGALL 2, b Galashiels, Selkirk
Dau: Mary A McDOUGALL 2 months, b Galashiels, Selkirk
Mother-In-Law: Mary AIMERS 80, Millwright & Farmer's Wid , b Yarrow, Selkirk
Brother: David McDOUGALL 26, Banker, b Borthwick, Midlothian
Brother's Wife: Selina McDOUGALL 32, b D----? (Dover?) ---?, Kent Servant: Isabella DALGLIESH 22, House Servant. b Blackbeck, Dumfriesshire
Servant: Mina KAY 20, House Servant, b Heavtre, Midlothian
Servant: Robert LAIDLAW 17, House & Groom, b Fermtay, --------??
1861: Campbelltown, ArgyllshireRef: Parish: 507, ED 10, pg 16
Address: Kirk Street
Head: David McDOUGALL 35, Banker, b Borthwick, Midlothian
Wife: Selina McDOUGALL 36, b Dover, Kent
Servant: Janet COHILTIER? 23, Servant, b Currie, Midlothian
1871: Campbelltown, ArgyllshireRef: Parish: 507, ED 5, Pg 20
Address: Longrow
Head: David McDOUGALL 45, Clydesdale Bank Agent Sheriff Sub & J P, b Borthwick, Midlothian
Wife: Selina McDOUGALL 47, b Dover, Kent
Nephew: David PAULIN 23, Accountant In Bank, b Irvine, Ayrshire
Servant: Flora McNEILL 35, Domestic Servt Cook, b Campletown Arygll
Servant: Janet McSPORRAN 19, Domestic Servt Maid, b Crubisdale??, Argyll
[Note: the nephew's parents were George PAULIN (PAULINE) and Ann McDOUGALL married Borthwick Edinburgh 1839 (IGI) - so he is from David's side, not Selina's]1881:Campbelltown, Argyllshire Ref: Parish: 507, ED 15, pg 5
Address: 21 Longrow Street
Head: David McDOUGALL 55, Honorary Sheriff Substitute & Justice Of The Peace For Argyllshire - Banker , b Borthwick, Midlothian
Wife: Selina McDOUGALL 60, b Dover Kent
Servant: Flora McNEILL 45, Domestic Servant, b Campbeltown-Gaelic, Argyll
Servant: Janet McSPORRAN 30, Domestic Servant, b Killean Gaelic, Argyll
SP shows (per free index search):Selina Ann McDOUGALL - other name REAKS - died 1884 in Campbelltown, Arygyll.
Her age is registered as 70 (= YOB abt 1814)
David McDOUGALL - died 1889 in Campbelltown, Arygyll.
His age is registered as 63 (= YOB abt 1826)
SP shows (per free index search):David left a Will:
David MacDougall - 25/02/1889 - Agent, Clydesdale Bank, Campbeltown, d. 27/01/1889 at Campbeltown, testate - Dunoon Sheriff Court - Ref SC51/32/37
Whilst you would need to check the originals on SP, it would seem David's age is consistent thru the Census, but Selina probably being a bit (!) 'coy' about hers and adjusted it down by 5 to 10 years!! Only at death is the true age revealed - probably by her widower who for all those Census never said a word!
Their burialFound a link via the Resources listings on the Argyll boards in Rootschat:
http://www.ralstongenealogy.com/kilkerrannewgraves.htmIt has:-
Kilkerran, New, Graveyard, Campbeltown, Kintyre Peninsula, Argyll, Scotland
Image Nr 72, File Nr 2
McDOUGALL David d.1889 age 64 yrs
REAKS Selina Ann d.1884
Looks like Selina got the last word

her age may not be recorded on the headstone if the index entry is anything to go by! Also note, as is the Scottish custom Selina is marked by her maiden name - the exact wording of the headstone may or may not make it clear they were espoused.
You can email the website owner and ask him for a copy of the hreadstone image - what a wonderful service they are providing and such a lot a lot of work must have gon into it! It looks like they provide an image for free.
Cheers
AMBLY