diff --git a/docs/EXTERNAL_TEST_DATA.md b/docs/EXTERNAL_TEST_DATA.md
index 07618ca80..d01695f57 100644
--- a/docs/EXTERNAL_TEST_DATA.md
+++ b/docs/EXTERNAL_TEST_DATA.md
@@ -181,16 +181,6 @@ The authors of the second letter also published their own reciprocal-space recon
 6RLR data as a separate Zenodo record,
 [10.5281/zenodo.6961763](https://doi.org/10.5281/zenodo.6961763).
 
-## Obtained but not in the table
-
-One further deposition was downloaded and is not listed above: SBGrid
-[10.15785/sbgrid/1295](https://doi.org/10.15785/sbgrid/1295), the room-temperature Bragg and
-diffuse-scattering data behind [4WOR](https://www.rcsb.org/structure/4WOR), collected at CHESS A1
-in 1995. The images are stored as CCD TIFFs written by the detector software of the time, a
-format the reader does not support, so the dataset is not processed here and the detector could
-not be read from its images. It is named because the data are public and the deposition deserves
-the same credit as the rest.
-
 ## Detector: image file vs PDB entry
 
 For 76 of the 77 PDB-coded rows both the image file and the PDB entry name a detector. (For
@@ -247,6 +237,19 @@ reader that globs `*.img` will pick them up, so they are named here rather than
 | `metformin` | Zenodo record 10.5281/zenodo.20135265 | a small-molecule dataset, not a PDB deposition |
 | `nidppe` | Zenodo record 10.5281/zenodo.20041091 | a small-molecule dataset, not a PDB deposition |
 
+Three of the four small-molecule sets have a published structure to check a run against. These are
+reference values from the literature, not results obtained here.
+
+| Dataset | Space group | Cell (A, deg) | T | Reference |
+|---|---|---|---|---|
+| `dnba` | `C 1 2/c 1` (15) | 20.2635 8.7575 9.6697 / 90 109.941 90 | 30 K | the Zenodo record's own title and the `xia2.html` the depositors ship inside it, corroborated by COD 4510614/4510615 - Cryst. Growth Des. **13** (2013) 1861-1871 [doi:10.1021/cg300906j](https://doi.org/10.1021/cg300906j) |
+| `metformin` | `P 1 21/c 1` (14) | 7.9104 13.8794 7.9310 / 90 114.606 90 | 100 K | the hydrochloride, form I; COD 2108029 - Acta Cryst. B**73** (2017) 10-22 [doi:10.1107/S2052520616017844](https://doi.org/10.1107/S2052520616017844) |
+| `nidppe` | `P 1 21/c 1` (14) | 11.2779 13.3386 15.8739 / 90 98.7953 90 | 150 K | COD 2012031 - Acta Cryst. C**57** (2001) 690-693 [doi:10.1107/S0108270101003961](https://doi.org/10.1107/S0108270101003961) |
+
+`cuhf2` has no confirmed cell. Its space group is published as `P 4/n m m` (Phys. Rev. B **81**,
+064422 (2010) [doi:10.1103/PhysRevB.81.064422](https://doi.org/10.1103/PhysRevB.81.064422)) but no
+numeric cell was located, so a run on it can be scored on the space group and not on the cell.
+
 ## Licences
 
 Each dataset carries the licence of its own deposition, stated on the record page linked