Dear Kathleen, I don't have indexes to 1910 and 1920, but I did bump into several people named William Dennison in Maryland. (I have family in Cecil County.) Interested? Cecil County, District 5, Maryland Page 191 stamped on page, page 381 written on page Lines 16-25 House 1539, Family 1560 Jesse Owen, age 70, male, farmer, born in MD. William Dennison, age 55, male, born in MD Sarah, age 41, female, born MD Rachel, age 21, female, born MD Hannah, age 16, female, born MD Jesse, age 14, male, born MD, attended school Mary, age 12, female, born MD, attended school William, age 8, male, born MD, attended school Sarah, age 5, female, born MD Margaret, age 2, female, born MD Cecil County, District 7?, Maryland (Note: In index these pages are listed as being in District 7, on actual census page, 2d subdivision has been written into the "inhabitants in . . ." line.) First page for this family: page 185 stamped on page; page 368 written on page. Second page for this family: no stamped number, page 372 or 572 written on page. First page for this family: lines 27-42 Second page for this family: lines 1-5 dwelling 1465, family 1487 William Dennison, age 43, male, farmer, born MD Mary, age 40, female, born MD John, age 20, male, plasterer, born MD Sarah, age 19, female, born MD Rebecca, age 14, female, born MD, attended school Elizabeth, age 11, female, born MD, attended school begin page 2: Margaret, age 8, female, born MD Maria, age 1, female, born MD George W., age 11, male, born MD Elizabeth, age 42, female, born MD William, age 7/12, male, born MD Montgomery County, 4th Rockerlee Election District page 392 stamped on page; page 783 written on page lines 17-25 dwelling 277, family 285 William Dennison, age 45, male, farmer, born (hard to read; looks like D6 - could be Dl for Delaware? DC for District of Columbia?), can't read/write Martha A. Dennison, age 38, female, born VA, can't read/write William H. Dennison, age 17, male, farmer, born VA James Dennison, age 14, male, born VA Lewis Dennison, age 12, male, born VA Joseph Dennison, age 10, male, born D6 (Del or DC?) Charles Dennison, age 8, male, born D6 (Del or DC?) Catherine Dennison, age 6, female, born MD Samuel Dennison, age 3, male, born MD If information on each person is not included above, then there was none (blank cells in census table). There were some other William Dennisons in MD in earlier census years, but I did not search for them. If they are potentially yours, then I will try to find them if you would like me to do so. I didn't find and William Dennisons in Delaware in any of the census indexes that are on Ancestry.com. There were court, land, or probate records of William Dennisons in Illinois, Arkansas, Mass., Michigan, Minnesota, and Ohio. I didn't find any William Dennisons with DE locations in the SSDI. I didn't find any Wallace Dennisons in the census lists indexes. I did notice that there is a Wallace Dennison in the Social Security Death Index: ssn: 155-20-0451, born: 1 Nov 1927, died: Jul 1958, social security card issued in New Jersey before 1951. He is the only Wallace Dennison in the SSDI There is also a Wallace Dennison living in Virginia Beach, phone: 747-496-5851. There was a Wallace (Wallis) Dennison probate record in Mass. (after 1840), a Wallace Dennison in TX land titles (1923), and a Wallace Dennison in 1890 Hamilton, Mass, Directory. Hope this helps, Karen Carter Sandy, UT