When I saw that this was the home of George H. Flanders, I went into Ancestry.com to see what I could find on him. It turns out that he is also a descendant of Steven Flanders and George is my 4th cousin, 4 times removed. Here's a chart that shows our relationship.
"One of the grandest mansions in Northwest Portland was the home of Captain George H. Flanders which stood on the block bounded by NW 19th and 20th Avenues, Flanders and Glisan Streets. This view looks northwest from 19th and Flanders. Designed by Justus F. Krumbein and built in 1882, it was replaced in 1926 by the extant Temple Beth Israel. Much of the rock wall pictured here is still in place. Seen in the background is the belvedere atop the home of Cicero Hunt Lewis on the block between Glisan and Hoyt (now Couch Park)."
George H. Flanders's sister Caroline was married to John Heard Couch. The Fold3 web site tells us this about John H. Couch:
Oregon Native Son and Historical Magazine, Vol. 1 May, 1899 No. 1
Biographical * Captain John H. Couch
Captain Couch was born February 21, 1811, at Newburyport, Mass. Upon arriving at an age when he could set out for himself, he chose the seafaring life, and until 1840 his voyages were confined to the waters of the Atlantic. In that year he rounded the Horn in command of the brig Maryland, and was soon in the waters of the Columbia. This vessel was sold in the Sandwich islands, when he returned home. In 1843 his employers again sent him to this coast in the brig Chenamus, and on his arrival at Oregon City he opened a general merchandise store, remaining in charge of the same until 1847, in the meantime sending the vessel back to its home port. In 1848 he was again at Newburyport, when he received the commendation of his employers for his fidelity and prudence in the management of their affairs in this far away section. Again they tendered him further employment of a like nature, but he declined. He was, however, prevailed upon to again return in the interests of another firm, and in 1849 the Madonna unloaded cargo at Portland which he was to dispose of, leaving the ship in command of Captain Geo. H. Flanders, his brother-in-law. After Captain Flanders had made several trips, he also gave up following the sea, and went into co-partnership with Captain Couch. This firm remained unbroken until the death of the latter. Captain Couch was treasurer of the provisional government; he was commissioner of Multnomah county; he was the first appointee to the office of inspector of hulls, a position which he retained under all administrations until his decease. After the organization of the state government he served as port warden and pilot commissioner. In each and every trust confided to him, never did a custodian more wisely, honestly and with greater fidelity fulfill the duties devolving upon him. As in public employment, so in private life. He was an exemplary citizen, and so genial and whole-souled in disposition that he was personally known and esteemed by every man, woman and child in Portland. What is known as Couch's addition to Portland was his donation claim, but little of it now remains uncovered by residences or buildings devoted to the various trades, manufactories and enterprises known to the city. Early in life Captain Couch was married to Miss Caroline E. Flanders. The union was blessed with four daughters, the three eldest becoming the wifes of Dr. R.B. Wilson, C.H. Lewis and Dr. Rodney Glisan; the youngest, Miss Mary H., is a native daughter. Captain Couch died January 19, 1870; his wife survived him until July 19, 1885.
Mrs. Couch was also born in Newburyport, Mass. She was a little over three years older than her husband, having been born October 24, 1807.
Of all the people who have been Oregonians, and especially residents of Portland, none were more highly esteemed during life, or their death more regretted, than this pioneer father and mother.
FROM OREGON PIONEERS:
COUCH, Capt. John H. (1811-1870): m'd FLANDERS, Caroline E.; a sailor who made many voyages during the years preceding 1839; a representative of the Cushing family in Massachusetts; entered the Columbia River in the spring of 1840 on board the brig Maryland; arrived again in 1843 in command of the brig Chenamus of Boston; remained in Oregon country kept a store in Oregon City until 1845; moved to Portland and took up claim; went east in 1847; arrived back in Portland in August 1849 on the bark Madonna; located permanently in Portland; held many offices and positions.
"After making three voyages from New England to the Pacific Coast between 1840 and 1845, Captain John H. COuch became convinced that Portland's deepwater location made its harbor superior to that of other potential ports in the area. It was Couch who persuaded Asa Lovejoy* and Francis Pettygrove that their Portland townsite should be platted, and Couch filed an adjacent claim just to thh north of theirs. Mercantile speculation marked Portland's founding.
Couch returned to his native New England in 1847. He had been absent from his wife, Caroline E. Flanders Couch, and his family for three years, but when news reached him of the discovery of gold in California, probably in late 1848, he and his wife’s brother, Captain George H. Flanders, responded quickly. Couch and Flanders arranged to set sail for San Francisco in January 1849. They filled their ships’ holds with lumber and other commodities to sell in California.
After Couch sold his cargo in San Francisco at a substantial profit, he sailed to Portland, convinced of its superiority as a port city and of its value as a base for supplying the gold rush trade. He built a covered wharf and a warehouse on his own 640-acre claim. He then platted the claim at an angle to match a bend in the river and included five narrow blocks that were meant to complement the nearby park blocks surveyed by early pioneer, Daniel Lownsdale in 1848.
Couch’s family apparently joined him sometime in 1849 because in 1852, his daughter, Clementine, wrote to a friend on the East Coast that in Portland both houses and ladies were now “numberless” when only three years before there had been but two proper houses and no ladies.
Further Reading: MacColl, E. Kimbark. Merchants, Money and Power: The Portland Establishment 1843-1913. Portland, Oreg., 1988.
Written by Trudy Flores, Sarah Griffith, Oregon Historical Society, 2002.
* The Oregon History Project also tells us this about my 3rd cousin 5 times removed Asa Lovejoy: Asa Lovejoy (1808-1882): A lawyer from Massachusetts, Asa Lovejoy and his traveling companion William Overton split a claim to 640 acres along the Willamette River in 1843, and it was on this site that Portland was founded. Overton sold his share to Francis Pettygrove, and Lovejoy and Pettygrove tossed a coin to decide if the site would be named after Lovejoy’s hometown of Boston or Pettygrove’s hometown of Portland, Maine. Lovejoy sold his half to Benjamin Stark in 1845, but remained active in the development of Oregon, serving as mayor of Oregon City, chief justice of Oregon, and adjutant-general in the war against the Cayuse after the 1847 Whitman killings. He was also a major stockholder for many of Oregon’s earliest businesses, including the Oregon Telegraph.