Thanks both - and Trevor - WOW..!!!! How could you find that stuff so quickly..

?
I started this family tree milarky about 6-months and I'm hooked. I think I'm naturally inquisitive - or nosey as my wife/mother would say. I just HATE not knowing stuff....
These are the absolute facts that I have:
1. Peter Pickett/Sophia Elizabeth Nash marriage - 2 March 1875 Holy Trinity Church in Dover. And as I said, Peter Pickett is listed as 40, widower and Private in the 10t4th
2. Peter Pickett also appears on the marriage certificate between Catherine/Katherine Pickett and Joseph Stevenson on 20 March 1880. Catherine and Joseph had a daughter 10 months later and she (Mary Jane) is my Grandfather's mother.
They are the only certificates I have, but CENSUS-wise:
1. 1891 Census - Dover St Mary Virgin, Kent, England
Peter Pickett (Head), 55, Railway Goods Porter, born in Ireland
Sophia E Pickett (Nash), 48, General Shop Keeper, born in Walmer, Kent
2. 1881 Census - Dover St Mary Virgin, Kent, England
Peter Pickett (Head) 45, Pensioner, born in Ireland
Sophia Elizabeth Picket (Nash), 38, Walmer, Kent
And they appear to have a 3-year old adopted son - Archibald MacMillan - who isn't there 10 years on
As for the elusive Catherine:
1. She's in Dover in 20 March 1880 as she married Joseph Stevenson - 4 Hawksbury Court (Joseph) and 57 Bulwark Street (Catherine)
2. She moves to Manchester the following year and remains there until her death - 11 May 1912
1901 Census - she's 43 and born in India, Allahabad making her birth year 1858
1891 Census - she's 32 and born in East Indies - her birth year 1859
1881 Census - she's 22 and born in Barrackpore - her birth year 1859
1880 marriage certificate - she's 21 - her birth year 1859
So I think, unless she was a big, fat, liar, she was born in 1859.
I can't find either Peter Pickett or Catherine before 1880 - so I'm presuming that she's still in India for the 1871 census?
Dugali appears to be in India, so that would fit as well.
Being discharged to Manchester would also fit - given his daughter moved there in 1881
Thanks for your help
Stephen