 The more Calvinistic "Auld Lichts" held to the obligations of the Solemn League and Covenant, the "New Lichts" were more theologically liberal — a notable and continuing influence in the post-1847 United Presbyterian Church of Scotland.In 1820, the New Licht Anti-Burghers and the New Licht Burghers united as the United Secession Church, which in turn united with the Relief Church in 1847 to create the United Presbyterian Church of Scotland, which united with most of the Free Church of Scotland in 1900 to create the United Free Church of Scotland, most of whom ultimately reunited with the Church of Scotland in 1929.The Anti-Burgher Auld Lichts became part of the United Original Secession Church in 1822, which split in 1852, one party joining in the Free Church of Scotland, the others finally reuniting with the Church of Scotland in 1956.