looking for henry holverson born in norway in 1824

HENRY IMMIGRATED TO THE U.S. IN 1840.HE WAS BORN JULY 21,1824 IN NORWAY.HE MARRIED SARAH JANE NIGHTENGALEIN 1859 IN HAMPTON,DAKOTA,MINN,USA. SARAH WAS BORN IN 1834 IN NEW YORK.THEY HAD 5 OR 6 CHILDREN AND MOVED AROUND ALOT.I HAVE FOUND THEM IN THE CENSUS RECORDS NUMEROUS TIMES.THEY EVENTUALLY MOVED TO IDAHO WHERE THEY GOT DIVORCED. SARAH TOOK THE LAST BORN AND REMARRIED AND RAISED THIS BABY UNDER HER NEW MARRIED NAME OF "QUINN". WHEN HE WAS ABOUT 19 YEARS OLD HIS OLDER BROTHER FOUND HIM AND TOLD HIM HE WAS ACTUALLY A HALVERSON.HE CHANGED HIS NAME BACK TO HALVERSON, BUT SPELLED IT HOLVERSON.OUR PROBLEM IS THAT WE CAN NOT FIND HENRY HALVERSON LISTED ON ANY PASSENGER LIST OR CENSUS REPORTS BEFORE 1840.SO, WE DO NOT KNOW HIS PARENT'S NAMES.NOR, CAN WE FIND SARAH NIGHTENGALE'S PARENT'S NAMES. WITHOUT KNOWING THEIR PARENT'S NAMESOR THEIR BIRTH PLACES, WE ARE AT A STANDSTILL.I THINK HENRY MAY HAVE MIGRATED TO WISC. AREA WITH SOME OF THE FIRST SETTLERS THAT CLENG PEERSON HELPED TO MIGRATE TO THE U.S. PLEASE LET ME KNOW IF YOU FIND HENRY OR SARAH IN YOUR FAMILY TREE!