1. INTRODUCTION  
2. MULTI-WAVELENGTH DATA  
3.2. Counterpart Identification  
3.3. Unidentified Sources  
4. DERIVING PHYSICAL PARAMETERS  
5. THE NATURE OF SCUBA-2 450-µm-SELECTED SOURCES  
6. INFRARED LF  
7. THE OBSCURED STAR-FORMATION HISTORY  
8. SUMMARY  