diff --git a/diary.md b/diary.md
index 7091029..95367da 100644
--- a/diary.md
+++ b/diary.md
@@ -38,3 +38,11 @@ Decoding is very similar, except that at each stage we Gray- decode D index bits
 N-dimensional mapping. http://www.dcs.bbk.ac.uk/~jkl/pubs/JL1_00a.pdf
 
 more spatial indexing info. http://blog.notdot.net/2009/11/Damn-Cool-Algorithms-Spatial-indexing-with-Quadtrees-and-Hilbert-Curves
+
+Hilbert Curve references:
+http://www.tiac.net/~sw/2008/10/Hilbert/
+http://www.dcs.bbk.ac.uk/TriStarp/pubs/JL1_00.pdf
+http://people.csail.mit.edu/jaffer/Geometry/HSFC
+http://people.csail.mit.edu/jaffer/Geometry/RFMDSFF
+https://github.com/jbruestle/aggregate_btree/blob/master/abtree/hilbert.c
+https://github.com/jbruestle/aggregate_btree/blob/master/abtree/hilbert.h
diff --git a/t/xy/1dto2d.t.js b/t/xy/1dto2d.t.js
index a82a01b..4d7476a 100644
--- a/t/xy/1dto2d.t.js
+++ b/t/xy/1dto2d.t.js
@@ -3,5 +3,41 @@
 require('proof')(1, function (equal) {
   var hilbert = require('../..')
 
-  equal(hilbert.d2xy(16, 2), [4, 0])
+  equal(hilbert.d2xy(1, 2), [1000, 7])
+  console.log("0:", hilbert.d2xy(0,2))
+  console.log("1:", hilbert.d2xy(1,2))
+  console.log("2:", hilbert.d2xy(2,2))
+  console.log("3:", hilbert.d2xy(3,2))
+  console.log("4:", hilbert.d2xy(4,2))
+  console.log("5:", hilbert.d2xy(5,2))
+  console.log("6:", hilbert.d2xy(6,2))
+  console.log("7:", hilbert.d2xy(7,2))
+  console.log("8:", hilbert.d2xy(8,2))
+  console.log("9:", hilbert.d2xy(9,2))
+  console.log("10:", hilbert.d2xy(10,2))
+  console.log("11:", hilbert.d2xy(11,2))
+  console.log("12:", hilbert.d2xy(12,2))
+  console.log("13:", hilbert.d2xy(13,2))
+  console.log("14:", hilbert.d2xy(14,2))
+  console.log("15:", hilbert.d2xy(15,2))
+  console.log("16:", hilbert.d2xy(16,2))
+/*
+  hilbert.d2xy(0,2)
+  hilbert.d2xy(1,2)
+  hilbert.d2xy(2,2)
+  hilbert.d2xy(3,2)
+  hilbert.d2xy(4,2)
+  hilbert.d2xy(5,2)
+  hilbert.d2xy(6,2)
+  hilbert.d2xy(7,2)
+  hilbert.d2xy(8,2)
+  hilbert.d2xy(9,2)
+  hilbert.d2xy(10,2)
+  hilbert.d2xy(11,2)
+  hilbert.d2xy(12,2)
+  hilbert.d2xy(13,2)
+  hilbert.d2xy(14,2)
+  hilbert.d2xy(15,2)
+  hilbert.d2xy(16,2)
+*/
 })
diff --git a/t/xy/1dto3d.t.js b/t/xy/1dto3d.t.js
index fa4e2d1..5b632db 100644
--- a/t/xy/1dto3d.t.js
+++ b/t/xy/1dto3d.t.js
@@ -1,7 +1,7 @@
 #!/usr/bin/env node
 
 require('proof')(1, function (equal) {
-  var hilbert = require('../..')
+    var hilbert = require('../..')
 
-  equal(hilbert.convertPointToDistance(16, 2, 2), 8)
+    equal(hilbert.convertPointToDistance(16, 2, 2), 8)
 })
diff --git a/t/xy/2dto1d.js b/t/xy/2dto1d.js
deleted file mode 100644
index 5c714d6..0000000
--- a/t/xy/2dto1d.js
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/usr/bin/env node
-
-require('proof')(1, function (equal) {
-  var hilbert = require('../..')
-
-  equal(hilbert.xy2d(16, 2, 2,), 8)
-}