Bentley Sidwell Productions were a very early pc dos cracking group, active at least in 1988. They also made some of the first pc cracktros.
Their release of Romance of the Three Kingdoms on july 30 1988, wrote in the nfo "Jack Daniels, our newest BSP member", indicating he joined that month.
They numbered some of their releases, which is helpful in pinpointing release date;
31 - Empire (august 1988)
25 - Paperboy (june 1988)
23 - Bedlam (june 1988)
20 - Willow
17 - Bad Street Brawler (may 1988)
They made a brief comeback in april of 1991 with their release of Vaxine (no cracktro, but writing "Well, folks, looks like the world-famous-fuzzy-TV-screen-loader-kinda-little-
off-the-wall-and-known-as-one-of-the-classic-cracking-groups is back. in the nfo), listing Lord Blix, The Guch, Mad Gib, Lord Sterling, The Viper, Iron Glove, Lord Ambercrombe and Hot Rod as members in the nfo.