1. INTRODUCTION

2. DATA
2.1. The 2MASS M-giant data
2.2. Simulations

3. METHODS
3.1. Group finding
3.2. Evaluation of clustering

4. RESULTS I: SURVEYS IN AN IDEALIZED UNIVERSE
4.1. Evolution of the peak density of satellite debris
4.2. Probability of detecting accretion events as groups
4.3. Relating group properties to accretion history
4.4. Fraction of material in groups

5. RESULTS II: SURVEYS IN A REALISTIC UNIVERSE
5.1. The effect of stellar populations
5.2. Events recovered as groups
5.3. Mapping accretion history with combined surveys
5.4. Limitations

6. APPLICATIONS TO THE REAL UNIVERSE
6.1. The 2MASS M-giant sample
6.2. SDSS MSTO sample

7. SUMMARY