Bob -
Just made a great find re William Armstrong and Mary Tatman of Cople.
They were never actually married! I just checked Pallots marriage index, and found the following entry:
"Tatman Mary & Wm Armstrong
Cople, Beds, 1802
Banns only. The above Mary Tatman has a husband living at Gt Staughton, Hunts"
Also found on Ancestry a 31-page set of images setting out the Army career in the Bedfordshire Regiment of Samuel Clark Armstrong from 1903 to 1924. Samuel, born in Thurleigh 23 Feb 1885, was a Baptist, and was the son of Samuel and Lydia, grandson of William b 1820 and his wife Dinah and great grandson of William 1792 and Elizabeth Franklin.
He was a right little weed at 18, 5ft 5ins tall with a 36 inch chest. He won the DCM in 1917, reached the rank of Temporary Regimental Sergeant Major by 1916, and was Regimental Quartermaster Sergeant on completion of his 21 year engagement in 1924. He seems to have got through the whole of WWI without injury other than a bit of conjunctivitis due to gas. Fascinating stuff! He married in 1919 to Elsie Shepherd of Bolnhurst, and until his discharge they had had one son, John Clark Armstrong b Aug 1920.