We have lit­tle da­ta on Ro­ber­tson. His tune Snow­den ap­peared in The Psal­ter (Pitts­burgh, Penn­syl­van­ia: Unit­ed Pres­by­ter­i­an Board of Pub­li­ca­tion, 1912).

1. Clark
2. Freeport
3. Snowden