Beek Gunders is at location: -223.67, -386.90, -13.81 which is left and in front of where a newbie halfling cleric spawns in Rivervale (if choosing it as home city), up on the dais.
faction hits for turning in the note:
Priests of Mischief +100
Mayor Gubbin +15
Guardians of the Vale +15
Interestingly there are no negative hits.
You also get your newbie chest piece: Faded Gold Felt Tunic*