diff --git a/classes.cpp b/classes.cpp
index bd63af4f..1a765af4 100644
--- a/classes.cpp
+++ b/classes.cpp
@@ -737,6 +737,7 @@ enum eGeometry {
   gSpace535, gSpace536, gSeifertCover, gSeifertWeber, gHomologySphere,
   gInfOrderMixed, gSpace436, gFake,
   gSpace345, gSpace353, gSpace354, gSpace355,
+  gHalfBring,
   gGUARD};
 
 enum eGeometryClass { gcHyperbolic, gcEuclid, gcSphere, gcSolNIH, gcNil, gcProduct, gcSL2 };
@@ -932,6 +933,7 @@ EX vector<geometryinfo> ginf = {
   {"{3,5,3}","none",    "{3,5,3} hyperbolic honeycomb",               "353",     20, 5, 0,         giHyperb3, {{7, 2}}, eVariation::pure},
   {"{3,5,4}","none",    "{3,5,4} hyperbolic honeycomb",               "354",     20, 5, qIDEAL | qULTRA,    giHyperb3, {{7, 2}}, eVariation::pure},
   {"{3,5,5}","none",    "{3,5,5} hyperbolic honeycomb",               "355",     20, 5, qIDEAL | qULTRA,    giHyperb3, {{7, 2}}, eVariation::pure},
+  {"{5,4}", "pBring",   "projective Bring's Surface",                 "pBring",   5, 4, qsSMALLN,   giHyperb2, {{6, 4}}, eVariation::bitruncated},
   };
   // bits: 9, 10, 15, 16, (reserved for later) 17, 18
 
diff --git a/quotient.cpp b/quotient.cpp
index 92f56b05..eff4b93d 100644
--- a/quotient.cpp
+++ b/quotient.cpp
@@ -318,6 +318,24 @@ struct hrmap_quotient : hrmap_standard {
         break;
         }
 
+      case gHalfBring: {
+        connections = {
+          5, 12, 16, 23, 29,
+          0, 32, 36, 43, 49,
+          50, 41|symmask, 1, 48, 34|symmask,
+          53|symmask, 2, 42|symmask, 45|symmask, 39,
+          40, 31|symmask, 37|symmask, 3, 54|symmask,
+          38|symmask, 52, 47|symmask, 33, 4,
+          55, 21|symmask, 6, 28, 14|symmask,
+          58|symmask, 7, 22|symmask, 25|symmask, 19,
+          20, 11|symmask, 17|symmask, 8, 59|symmask,
+          18|symmask, 57, 27|symmask, 13, 9,
+          10, 56|symmask, 26, 15|symmask, 24|symmask,
+          30, 51|symmask, 46, 35|symmask, 44|symmask
+          };
+        break;
+        };
+
       case gSchmutzM2: {
         connections = {
           23,  47,  27,  14,  38,  30,  17,  41,  33,  20,  44,  24,