fig1c:
2 x rows
1. Stage Position (mm)
2. Conicidence Counts (s^-1)

fig2:
12 x rows
1-6 (repeated). Interferometer Path Difference (um)
7. Theory - 0 photon states output
8. Not shown in Paper
9. Theory - 1 photon states output
10. Theory - 2 photon states output
11. Experiment - 2 photon states output
12. Experiment - 2 photon states input

fig3
4 x rows
1-2 (repeated). Interferometer path difference (um)
3. Theory - rho00 (2 photon absorption) amplitude 
4. Experiment - rho00 (2 photon absorption) amplitude