  Using the 850 micron SCUBA camera on the JCMT and a scanning technique
different from other sub-mm surveys, we have obtained a 125 square arcminute
map centered on the Hubble Deep Field. The one-sigma sensitivity to point
sources is roughly 3 mJy and thus our map probes the brighter end of the sub-mm
source counts. We find 6 sources with a flux greater than about 12 mJy (>4
sigma) and, after a careful accounting of incompleteness and flux bias,
estimate the integrated density of bright sources N(>12 mJy)= 164 (+77/-58) per
square degree (68 per cent confidence bounds).
