In addition to our ancestor "Daniel Spencer" (or "David Spencer") who lived in Kingston Township, Luzerne County, Pennsylvania, during the first half of the 1800s, from 1811 to 1820 early Luzerne County newspapers ran four separate advertisements that refer to a "Daniel D. Spencer," a farmer of Kingston and Providence Townships who is listed as a Luzerne County resident in the 1820 and 1830 U.S. Censuses. However, he is a different person from our ancestor Daniel Spencer and should not be confused with him. In the 1820 U.S. Census, Daniel D. Spencer was a resident of Providence, Luzerne County, and in the 1830 U.S. Census he was a resident of Blakely, Luzerne County -- but, as mentioned above, during those years our Daniel Spencer was recorded in the U.S. Census as living in Kingston Township, and therefore could not be the same as the Daniel D. Spencer of Providence and Blakely.
For reference, here follows the text of the four advertisments that mention this other Daniel D. Spencer (emphasis added):
"Carding Machine — The subscribers respectfully inform the public that they have rented the Carding Machine of Stephen Hollister, Esq., in Kingston, where work will be done in the neatest and most expeditious manner. The machine is now in complete repair, and they hope by strict attention to the business, to receive a share of the public patronage. Wool will be received at the store of Robinson & King, in Wilkesbarre and returned there when carded. Daniel D. Spencer, Isaac Hollister, Kingston." (The Gleaner and Luzerne Advertiser, 7 June 1811)
"A Wool Carding Machine will commence operation on the 1st June with new cards, at the mill formerly occupied by Spencer & Hollister. Wool can be left at the store of Messrs. Robinson & King in Wilkes-Barre, and at Miner Searles', Pittston and returned every Friday at Pittston and Saturday at Wilkes-Barre. Constant attendance will be given by Daniel D. Spencer & Philo C. Curtis. For the proprietors, Joseph Swetland & James Hughes, Kingston." (The Gleaner, 28 May 1813)
"Fulling and Dressing Cloth. Hezekiah Parsons, Returns thanks for past favors, and informs his friends and the public that he has commenced Fulling and Dressing cloth, and having a good journeyman, flatters himself he shall be able to satisfy those who may favor him with their custom. Cloth will be received and returned when dressed, at the stores of Wm. Barnes, Wilkes-Barre and Searle & Smith, Pittston. Daniel D. Spencer, having made arrangements for Fulling and Dressing Cloth at the shop of Hezekiah Parsons, will receive cloth and return it when dressed, at Elias Hoyt's store and Philip Myer's, Kingston and Rogers & Co., Plymouth." (The Gleaner, 29 Sept. 1815)
"Wool Carding. The subscribers have entered into Co-Partnership and have taken the Fulling Mill formerly owned and occupied by John Waters, in Providence Township. George Gledhill, Daniel D. Spencer, Providence." (Susequehanna Democrat, 27 October 1820)