Looks like his reign was very a good one.

From 1920 through 1945 E. R. Bradley had 28 entries in the Derby and ALL had a name beginning with the letter "B".

Idle Hour Stock Farm was his handle in the earlier years. He had 3 entries in some races.
The 4 Derby winners were:
1921 Behave Yourself
1926 Bubbling Over
1932 Burgoo King, Brother Joe was second
1933 Brokers Tip

...and that's my missed 1/2 hour of sleep...