The Lions won the toss and elected to bat, and threw down the gauntlet to their south coast opponents by posting 305-4 off their allotted 50 overs.
Joe Willis (61) and Ollie Haines (30) put on an opening stand of 79, before Horsham captain Nick Oxley (87) and Will Beer (87* off 74 balls) bludgeoned 156 in an excellent fourth-wicket partnership.
The reply saw Eastbourne reduced to 36-3 thanks to a devastating opening spell from the Lions’ Sam Martin-Jenkins (3-43).
But resistance was offered by Archie Lenham, batting at three. Lenham was eventually dismissed by Ben Williams (1-60) for 115 with the score at 208-8.
It was left to Oxley (1-43) and Haines (3-46) to mop up the last two Eastbourne wickets as Horsham claimed the 30 points.
The Lions, who sit fourth in the Premier Division after three games – two of which were cancelled, visit second-from-bottom Bognor Regis CC this Saturday.
Here is a selection of photos from the game courtesy of photographer John Lines.
The reply saw Eastbourne reduced to 36-3 thanks to a devastating opening spell from the Lions’ Sam Martin-Jenkins (3-43).