diff --git a/SaneTsv/SaneTsv.cs b/SaneTsv/SaneTsv.cs
index 2418de6..4fef70e 100644
--- a/SaneTsv/SaneTsv.cs
+++ b/SaneTsv/SaneTsv.cs
@@ -30,7 +30,6 @@ public class SaneTsv
   // TODO: We need to be able to update all these in tandem somehow
   public string[] ColumnNames { get; protected set; }
   public ColumnType[] ColumnTypes { get; protected set; }
-  public Dictionary<string, List<object>> Columns { get; protected set; }
   public List<SaneTsvRecord> Records { get; protected set; }
   public string FileComment { get; protected set; } = null;
 
@@ -53,7 +52,6 @@ public class SaneTsv
   protected static SaneTsv Parse(byte[] inputBuffer, FormatType format)
   {
     var parsed = new SaneTsv();
-    parsed.Columns = new Dictionary<string, List<object>>();
     parsed.ColumnNames = new string[] { };
     parsed.ColumnTypes = new ColumnType[] { };
     parsed.Records = new List<SaneTsvRecord>();
@@ -191,14 +189,7 @@ public class SaneTsv
                 throw new Exception($"Invalid type '{columnTypeString}' for column {j}");
             }
 
-            try
-            {
-              parsed.Columns.Add(columnName, new List<object>());
-            }
-            catch (Exception e)
-            {
-              throw new Exception($"Column name {columnName} is not unique", e);
-            }
+            // TODO: Check column name uniqueness
 
             parsed.ColumnNames[j] = columnName;
             parsed.ColumnTypes[j] = type;