diff --git a/QuickFIXn/DataDictionary/InvalidMessageTypeException.cs b/QuickFIXn/DataDictionary/InvalidMessageTypeException.cs
index 3d304c176..c736cd94f 100644
--- a/QuickFIXn/DataDictionary/InvalidMessageTypeException.cs
+++ b/QuickFIXn/DataDictionary/InvalidMessageTypeException.cs
@@ -5,14 +5,14 @@ namespace QuickFix.DataDictionary;
 [Obsolete("This class will be removed in 1.16 (because it's unused)")]
 public class InvalidMessageTypeException : ApplicationException
 {
-    [Obsolete("This class will be removed in a future release (because it's unused)")]
+    [Obsolete("This class will be removed in 1.16 (because it's unused)")]
     public InvalidMessageTypeException() { }
 
-    [Obsolete("This class will be removed in a future release (because it's unused)")]
+    [Obsolete("This class will be removed in 1.16 (because it's unused)")]
     public InvalidMessageTypeException(string message)
         : base(message) { }
 
-    [Obsolete("This class will be removed in a future release (because it's unused)")]
+    [Obsolete("This class will be removed in 1.16 (because it's unused)")]
     public InvalidMessageTypeException(string message, System.Exception inner)
         : base(message, inner) { }
 }
diff --git a/QuickFIXn/DataDictionary/MissingRequiredFieldException.cs b/QuickFIXn/DataDictionary/MissingRequiredFieldException.cs
index 626c3a2fe..03bf86a33 100644
--- a/QuickFIXn/DataDictionary/MissingRequiredFieldException.cs
+++ b/QuickFIXn/DataDictionary/MissingRequiredFieldException.cs
@@ -7,18 +7,18 @@ namespace QuickFix.DataDictionary;
 [Obsolete("This class will be removed in 1.16 (because it's unused)")]
 public sealed class MissingRequiredFieldException : ApplicationException
 {
-    [Obsolete("This class will be removed in a future release (because it's unused)")]
+    [Obsolete("This class will be removed in 1.16 (because it's unused)")]
     public MissingRequiredFieldException() { }
 
-    [Obsolete("This class will be removed in a future release (because it's unused)")]
+    [Obsolete("This class will be removed in 1.16 (because it's unused)")]
     public MissingRequiredFieldException(int field)
         : base($"Missing required field: {field}") { }
 
-    [Obsolete("This class will be removed in a future release (because it's unused)")]
+    [Obsolete("This class will be removed in 1.16 (because it's unused)")]
     public MissingRequiredFieldException(string message)
         : base(message) { }
 
-    [Obsolete("This class will be removed in a future release (because it's unused)")]
+    [Obsolete("This class will be removed in 1.16 (because it's unused)")]
     public MissingRequiredFieldException(string message, System.Exception inner)
         : base(message, inner) { }
 }
diff --git a/QuickFIXn/Fields/FieldBase.cs b/QuickFIXn/Fields/FieldBase.cs
index 50f5f0380..3dd7330c7 100644
--- a/QuickFIXn/Fields/FieldBase.cs
+++ b/QuickFIXn/Fields/FieldBase.cs
@@ -147,13 +147,13 @@ private void MakeStringFields()
         _changed = false;
     }
 
-    [Obsolete("Use capitalized ToStringField() instead")]
+    [Obsolete("Use capitalized ToStringField() instead. This function will be removed in 1.16.")]
     public string toStringField() { return ToStringField(); }
-    [Obsolete("Use capitalized GetLength() instead")]
+    [Obsolete("Use capitalized GetLength() instead. This function will be removed in 1.16.")]
     public int getLength() { return GetLength(); }
-    [Obsolete("Use capitalized GetTotal() instead")]
+    [Obsolete("Use capitalized GetTotal() instead. This function will be removed in 1.16.")]
     public int getTotal() { return GetTotal(); }
-    [Obsolete("Renamed to 'Value'")]
+    [Obsolete("Renamed to 'Value'. This attribute name will be removed in 1.16.")]
     public T Obj
     {
         get => _value;
@@ -163,9 +163,9 @@ public T Obj
             _changed = true;
         }
     }
-    [Obsolete("Use Value getter property")]
+    [Obsolete("Use Value getter property. This function will be removed in 1.16.")]
     public T getValue() { return Value; }
-    [Obsolete("Use Value setter property")]
+    [Obsolete("Use Value setter property. This function will be removed in 1.16.")]
     public void setValue(T v) { Value = v; }
 }
 
diff --git a/QuickFIXn/Fields/IField.cs b/QuickFIXn/Fields/IField.cs
index a2cbb880b..5320486e4 100644
--- a/QuickFIXn/Fields/IField.cs
+++ b/QuickFIXn/Fields/IField.cs
@@ -29,11 +29,11 @@ public interface IField
         /// </summary>
         public int GetTotal();
 
-        [Obsolete("Use capitalized ToStringField() instead")]
+        [Obsolete("Use capitalized ToStringField() instead. This function will be removed in 1.16.")]
         public string toStringField();
-        [Obsolete("Use capitalized GetLength() instead")]
+        [Obsolete("Use capitalized GetLength() instead. This function will be removed in 1.16.")]
         public int getLength();
-        [Obsolete("Use capitalized GetTotal() instead")]
+        [Obsolete("Use capitalized GetTotal() instead. This function will be removed in 1.16.")]
         public int getTotal();
     }
 }
diff --git a/QuickFIXn/Message/Group.cs b/QuickFIXn/Message/Group.cs
index 24dc43bd2..263b9c424 100644
--- a/QuickFIXn/Message/Group.cs
+++ b/QuickFIXn/Message/Group.cs
@@ -1,6 +1,5 @@
 using QuickFix.ObjectPooling;
 using System;
-using System.Text;
 
 namespace QuickFix
 {
@@ -55,7 +54,7 @@ public virtual Group Clone()
         /// </summary>
         public int CounterField { get; }
 
-        [Obsolete("Use CounterField instead")]
+        [Obsolete("Use CounterField instead.  This will be removed in 1.16.")]
         public int Field => CounterField;
 
         /// <summary>