I made a comment on the topic titled "The Greatest Dove Worker Of All Times" or something to that effect.
If I remember correctly, Gen. Grant won the contest for Originality at a magician's convention in 1955 in Bridgeport, Ct. It was either the IBM or SAM Nat'l Convention. He won for the one handed dove to silk effect.
I happened to know Gen. at the time and all the magicians who gathered each Saturday at Holden's Magic Shop in Boston were talking about it. It seems to me that Gen. would not have won for Originality if Channing Pollock had already started using the effect, since most Professional Magicians would have been aware of it and hence no prize for Gen.
I remember seeing Channing on the Ed Sullivan Show in March of 1954 but, I don't remember him doing the Dove to Silk on TV at that time. However, when Pollock returned from Europe he played the Sullivan show again in July of 1960 and did (or attempt) the Dove to Silk but, he missed and the dove skid across the floor. His assistant, and then wife Mimi, covered very smoothly for him by nonchalantly picking up the dove and putting it in its cage. Channing, without missing a beat, finished his act beautifully. The sign of a true professional.