108 THE ESSEX NATURALIST. a mile south-east of Rolls Farm, and within sixty yards of the sea-wall. There are eight pipes clearly defined so that their tapering shape can be easily made out. These pipes, as was usual in the construction of old decoys, curve away from the main pond, so that their narrow extremities are concealed from it behind the embankment surrounding the pond. When first visited during a period of drought, there was little water in any of the pipes, although the pond was well filled. On January 12th, 1936, however, when we visited all four decoys again, the pipes were full of water, so that the shape of the whole pond was characteristic and reminiscent of the plans in Miller Christy's Birds of Essex. Seen thus, we estimated that the area of this pond was slightly larger than that of Skinner's Wick. At high tide redshanks come from the saltings to rest around the main pond, while the embankment is a favourite nesting-haunt of Shelducks, for it is riddled with rabbit holes. 2. Pond in Fresh Marsh approximately a quarter of a mile east from 1. This pond is within a quarter of a mile of the pond in Rolls Farm fresh marsh and is separated from it by a salt water creek which forms a marked kink in the sea wall, well shown in the six-inch Ordnance map and also on the map in A History of the Birds of Essex. The pond is within fifty yards of the sea wall. It is about half a mile west of Bohun's Hall decoy and not quite half a mile south-west of Decoy Farm. There are eight pipes, similar in construction to those at 1, but not so well marked. The main pond, which is slightly larger than Skinner's Wick, but not so large as Bohun's Hall, held a fair amount of water when we visited it. Like the pond on Rolls Farm it is a favourite haunt of many redshanks and Shelducks. Remarks. Whatever the history of these ponds may be, I think no one who inspects them will deny that they were undoubtedly constructed as decoys. Both ponds are quite as well preserved as Skinner's Wick, especially the Rolls Farm pond, where the pipes are very conspicuous. I have had no opportunity of searching through the literature dealing with Essex decoys for information concerning them, and a few local enquiries have only elicited the information that the pond at Rolls Farm is