I found the immigrations tonight for Reitze and Dirkje. I've saved the manifests which I could send by e-mail. Here are the details:

de Haan—New York, 2 Apr 1881 aboard the SS City of Chester out of Liverpool, England (couple traveling with three children)

Machiela (Dirkje, 17, and Anna, 10)—New York, 31 May 1890 aboard the SS Werkendam out of Amsterdam (two sisters? Dirkje had a sister Antje who was 13 at this date; they were orphaned in 1882)

carlsonjm@hotmail.com