You've got two people mixed up.
Len Belcher, who recently died (obituary in the March Magic Circular) was a contributor to many magic magazines.
"Card Control" is by Arthur Buckley, who was an Australian stage magician, close-up worker and mentalist who moved to the US. The book is part of the well-known "Buckley Trilogy" which also includes "Principles and Deceptions" and "Gems of Mental Magic".
The Bart Whaley entry in "Who's Who in Magic" is below.
Buckley, Arthur H[erbert]
(Sydney, Australia: 15 Dec 1890-20 Feb 1953) Inspired at age 18 seeing Allan Shaw show in New Zealand. Learned from Down's Modern Coin Manipulation. Debut 6 months later (still 1908) as "Young Dante, King of Koins". Thence pro coin-cardman as "Mysto" in Australia & New Zealand. Moved to USA in late 1919 [sic]. By 1925, also as "Mysto", worked two-person mind-reading with partner-wife Helen. Briefly in Australia c1939-c1943 when resettled in Chicago where became an electrical engineer. Died of a heart attack.
Invented Knock 'Em Dead (by 1928) & the muscle pass (by 1948). Wrote The Burglar (1921), New and Improved Effects with Cards (1921), Improved and Original Card Problems (1924, with Goldenberg), Card Control (1946, 219pp; repr 1973), Gems of Mental Magic (1947, 132pp, with John Brown Cook; repr 1973), & Principles and Deceptions (1948, 222pp; repr 1973), the last 3 all classics. Trick in Tarbell #5. [McC;Wal;Berg;Dor;St]