The Church History Library is now online. One interesting find... Marilla Terry Crawford Hansen and her six kids crossed the plains in 1861 in the same pioneer company as Solomon Joseph DeSpain.
90 years later her great grandson, Lloyd married his great granddaughter Marna.
My dad's grandmother, Sarah Elizabeth Hansen was a 4 year old on the trip and mom's grandfather, William Joseph DeSpain was an 18 year old in the same company.
They were part of the David H Cannon company which arrived in SLC, August 11, 1861 5pm.
The civil war started on 12 April 1861. This company organized on 19 May 1861 and left Florence (Neb) on 1 June 1861.
As an indication of the condition of Solomon's wife, Ruth... David
Alvin DeSpain was born 1 Sept 1861 in Granite UT as her tenth child..
(note added: My dad's sister Irene married a great grandson of Solomon Joseph DeSpain in 1943).