diff --git a/SabreTools.Helper/Tools/ArchiveTools.cs b/SabreTools.Helper/Tools/ArchiveTools.cs
index e0279880..01642aba 100644
--- a/SabreTools.Helper/Tools/ArchiveTools.cs
+++ b/SabreTools.Helper/Tools/ArchiveTools.cs
@@ -509,6 +509,28 @@ namespace SabreTools.Helper
 			return roms;
 		}
 
+		/*
+		(Torrent)GZ Header Format (https://tools.ietf.org/html/rfc1952)
+			00			Identification 1 (0x1F)
+			01			Identification 2 (0x8B)
+			02			Compression Method (0-7 reserved, 8 deflate; 0x08)
+			03			Flags (0 FTEXT, 1 FHCRC, 2 FEXTRA, 3 FNAME, 4 FCOMMENT, 5 reserved, 6 reserved, 7 reserved; 0x04)
+			04-07		Modification time (Unix format; 0x00, 0x00, 0x00, 0x00)
+			08			Extra Flags (2 maximum compression, 4 fastest algorithm; 0x00)
+			09			OS (See list on https://tools.ietf.org/html/rfc1952; 0x00)
+			0A-0B		[if FEXTRA set] Length of extra field (mirrored; 0x1C, 0x00)
+			0C-ww		[if FEXTRA set] Extra field
+				0C-1B	MD5 Hash
+				1C-1F	CRC hash
+				20-27	Int64 size (mirrored)
+			ww+1-xx		[if FNAME set] Original filename, 00 terminated
+			xx+1-yy		[if FCOMMENT set] File comment, 00 terminated
+			yy+1-yy+03	[if FHCRC set] CRC16
+			yy+04-zz	Compressed blocks
+			zz+1-zz+5	CRC32
+			zz+6-zz+10	Size (< 4GiB, mirrored)
+		*/
+
 		/// <summary>
 		/// Retrieve file information for a single torrent GZ file
 		/// </summary>