Complex sentence: After the rising failed and Argyll himself executed, Campbell went into exile in the Netherlands and forfeited his estates; despite recovering them in 1689, he had been financially ruined by the Atholl Raid which devastated large parts of Argyllshire.
Split into simpler sentences: After the rising failed and Argyll executed, Campbell went into exile in the Netherlands. Duncan Campbell recovered his estates in 1689 but was financially ruined by the Atholl Raid that devastated large parts of Argyllshire.