I have John W. and Junius Spratley in my database but as cousins rather than brothers. My John W. was the son of John Nicholas Spratley and Sally Hartwell Carsley and was born 1834 in Surry Co., VA. John Nicholas died 1839. Junius Spratley is the son of Edwin Thomas Spratley and Cornelia Harmon Dillard and was born ca. 1837 in Surry Co. His father Edwin Thomas Spratley died 1843. I've assumed at this point that these were the two who lived in Leavenworth KS because of the ages on the census and their occupations. I have no actual proof and they've both been a sticking point in my research.
I have information on both families if you'd like it. You can contact me at: email@example.com