The pattern of discolouration was very clear when the shield was recovered from the River Witham (see 1863 drawing below). Although it is still possible to see the discolouration under certain lighting conditions, the boar design is no longer easy to make out.
The discolouration pattern on the shield was clearly visible when recovered from the River Witham (referring to a 1863 drawing).  While some of the discoloration can still be seen under certain light, the boar design is now difficult to make out.