The 210 taxied from the hangar next to the restaurant all of the way to the
far end of the runway, while the 152 simply taxied from the restaurant
directly onto 9 and departed.

As I recall, the 210 only announced his taxi prior to going down the runway,
while the 152 said Cessna xxx departing runway 9, Lone Rock.

They converged at approximately midfield, with the 152 taking evasive action
by doing a steep right turn to the south away from the runway at low
altitude, while the 210 climbed on runway heading and did not take any
obvious evasive action. The 210 did not announce his takeoff roll, but he
clearly was on the runway and visible from the far end (where we were parked
in front of the restaurant). It happened so fast and we hadn't powered up
yet, so couldn't even have given a warning call on the radio.

It's hard to say, but from our perspective it looked like they came within
100 feet or less. In my opinion it was clearly the fault of the 152. For a
few brief moments there was a lot of traffic- a 337 landed, a Mooney was
running up, a Stearman departed, and we were cranking in the Baron, in
addition to the 152 and 210- a lot going on for a small uncontrolled field.