Some info about the author from the RockIslandAuction site: 

When it comes to competitive target shooting, a name that one finds frequently is Al Freeland. He was known as an accomplished rifleman, but also as a respected major supplier for others who strove to be as serious about their competitive shooting as “Uncle Al” was. How serious was he? He won numerous small bore championships and set several world records. Furthermore, he custom designed many of the rifles he used.  Beginning with BSA Martini actions, he would assemble custom rifles capable of surgical precision. 

Freeland made his own barrels, modified receivers, made and bedded his own forends (hand-checkered of course), and 

used his trademark 3-position aluminum buttstock which would become a standard feature on later BSA Martini target rifles. Seemingly never satisfied, he even designed and sold many of his own accessories including a rifle case that became a standard for many a target shooter in the 1950s – 1980s. It was exactly this type of serious involvement and expertise that had BSA engineers reaching out to Uncle Al to personally discuss his recommendations and ideas. In return, they gave him sole importer rights until his passing in the early 1980s.