States: Iowa: Johnson
Unfortunately, the marriage records I have are for much earlier years than 1900 and more current. My records are about 1845 - 1875. I do find the following marriage in Johnson Co. for a SWEET, however:
WILLIAM T. SWEET married MARY E. HILLHOUSE in Johnson Co. on May 26, 1875.
That's all I can find at this time in my records. I hope this is helpful to you.
By the way, I have some info on the MUSSER name as there has been a book published of Civil War letters by CHARLES O. MUSSER, 29th Iowa Infantry, whose family lived in Pottawattamie Co., Iowa, during the war. I'm from Pott. Co. and have much information about that area.