I have not located him in the 1860 census. His father, William, m2:(1857) Christine E. BLAINE. I am looking for 1860 ZEEKs in order to locate the missing 1860 BLAINEs. My thought is that Darwin ZEEK might be living near the BLAINEs in 1860. Possibly (as was common) children are listed with the head-of-household (step-father?) surname. Handwriting (SPELLING!!) and photo-quality is just awful in some of the LaSalle and Lee county entries. I've tried Parwin for Darwin, etc. Onward!