  We performed digital processing of a large set of photographic plates for
X-ray binary system V4641 Sgr containing a black hole. A total of 277 plates
were found in archives dated between 1960 and 1992. Photographic observations
revealed lower level of outburst activity if to compare with CCD data after the
large 1999 outburst. Only single outburst which happened in 1978 was confirmed.
If archive photographic data are used along with contemporary CCD observations,
the orbital period may be improved, and its value is 2.81728 +/-0.00004 day.
