Sorry to intrude on your Armstrong topic, my g.grandfather was a Walter Armstrong, b.c. 1845. in, Roxborough, Dumfries, or  Borders, depends which census you read. 
To date i have not traced his family, apart from, i think he married, 1870, Rotherham Emma Hall.
 There was a topic on here, 6/3/07, Armstrong family Sheffield 1901 Cen.,  I was wondering if you Armstrong researchers had come across this family in your endeavours ?
                                     Bodger