 The Brokmerbrief is unique among the documents of Old Frisian law in consisting of a code of law in the strict sense, rather than a compilation.It is preserved in two manuscripts, one of which is in the State Archives of Lower Saxony in Oldenburg and the other in the Lower Saxony State Library in Hanover.The middle section of the text strongly resembles the Emsig law on fines, indicating a common source.