I am trying to find out why William Pickard married to Elizabeth Brown in Longside, ended up in longside. He was born 1805 in Sileby Leicstershire. Does anyone know why or what the reasons may have been at that time? His father was also William Pickard married to Mary Farquhar of Strichen Aberdeenshire. I'm just up against a brick wall.

For a start, where is longside? If his mother was from Scotland, and he was born in Leicestershire, she had obviously moved a long way, so why did she move? What was the occupation of William (either Senior or Junior) Anything that people come up with will be guess work.

As the previous poster says it will be pure guesswork but most of the movement around from area to area in those days was for work purposes.
Knowing Williams occupation may give you a clue.