Nick kindly sent a file in which he juxtaposed Tram's sax breaks in Ostrich Walk and Riverboat Shuffle (second break).
bixography.com/TrambreaksOstrichWalkRiverboatShuffle.wav
The similarity is pretty amazing. Compelling evidence that the breaks are played by one and the same man, namely, Orie Frank Trumbauer, saxophonist extraordinaire.
Thanks, Nick.
Albert