Births in England which seem to correspond to the names (but as Darwood, not Dorwood) and dates of the children you mention:
Henry John Darwood 1880 2nd qtr Registration District of Norwich Vol. 4b Page 121
Elizabeth Jane Darwood 1881 4th qtr Registration District of Shardlow, Derbyshire Vol. 7b Page 454
Jessie May Darwood 1885 2nd quarter Registration District of Shardlow, Derbyshire, Vol. 7b Page 492
Donald Walter Darwood b. 22 April 1887, 22 Caledonian Place, Edinburgh, to Henry Darwood, formerly 45th (45th? 65th? registrar's handwriting not clear) Regiment, and Margaret Darwood, formerly Downie, maiden surname Urquhart. = Birth 685(1)/1887/670 (Entry no. 670 in the Register of Births for 1887 for the Registration District of Edinburgh (St George)) Date and place of parents' marriage given as 1 January 1880, Aldershot
Henry Darwood married Margaret Downie 1880 First quarter Registration District of Farnham, Surrey Vol. 2a, Page 137 (RD Farnham, although it is in Surrey, covers the District of Aldershot which is actually in Hampshire.
James Downie, 26, shipwright, residence at time of marriage 1 Scotland Street, Kinning Park (which was formerly a separate police burgh until it was absorbed by Glasgow), father James Downie, farmer, mother Jane Downie, maiden surname McAllister
married 17 June 1870, 6 Brighton Place, Govan, Lanarkshire (646(1)/1870/92 (Entry no. 92 in the Register of Marriages for 1870 for the Registration District of Govan Church, Lanarkshire)
Margaret Urquhart, 25, residence at time of marriage 9 Brighton Place, Govan, father James Urquhart, joiner, deceased, and Margaret Urquhart, maiden surname Mathieson. Duncan Brown and Barbara Alexander signed the register as witnesses.
James Downie died 1873, aged 27 (!!), 501/1873/133 RD Old or West Kilpatrick, Dunbartonshire
James Downie baptised 14 June 1843 Registration District of Saddell and Skipness, Argyll