On this Grandparents Day, we get better acquainted with Sarah Eva Howe's maternal grandparents, Richard Henry Cost and Sarah Evaline Arnet.
Once again, I discover that Sarah Eva Howe's scrapbooks contain more information about the men in her family tree than about the women. As you read this post, please hold me blameless for saying more about her grandfather than about her grandmother.
in Cincinnati, Hamilton County, Ohio, to Henry
Cost (1808-1876) and Mary Arison (1811-1889) .
On 23 April 1857 in Cincinnati, he married Sarah Evaline Arnet . He died 11 July 1910 in Cincinnati and was buried in Spring Grove Cemetery there. 
Sarah Evaline Arnet was born 9 July 1836 in Ohio to David Arnet (1806-1897) and Elizabeth Voris/Vorheis (abt 1810-1892).  She died 19 June 1917 in the Price Hill area of greater Cincinnati, Hamilton County, Ohio, and was buried next to her husband in Spring Grove Cemetery.  
The photo below from the Howe-Salyers family album is dated 1911 and labeled with Sarah's name and a notation "age 75." I think this looks like a much younger woman, and the clothing style looks earlier than 1911. Either the photo is in the wrong place or is mislabeled. I'll be looking for clarification and will make corrections if I learn more about the photo.
I developed the following list of children for Henry and Sarah. While the obituary below says the couple had 10 children, I have been able to name only nine. I have documentation only for Alice Ada, who became the mother of Sarah Eva Howe, our scrapbooker. I welcome corrections and source information on the other children.
Children of Richard H. and Sarah E. Arnet Cost:
Asa Wilbur, Cost 1858-1859
Alice Ada Cost, 1859-1939
Jessie Fremont Cost, 1861-1920
Lillie Maria Cost, c1867-c1873
Mary Naomi Cost, 1869-?
Clara Evelyn Cost, 1871-1873
Ida Lenora/Leonora Cost, c1874-1921
Richard Henry Cost, Jr., 1876-?
Morris Elliott Cost, 1879-1961
Spring Grove Cemetery, where both Richard and Sarah are buried, is a National Historic Landmark. By some accounts, it is the second-largest cemetery in the U.S. The first internment there occurred on 1 September 1845. I found these Spring Grove burial records online.
While I have yet to locate an obituary for Sarah Evaline Arnet Cost, her granddaughter's scrapbook had this typed memorial to grandfather Richard Henry Cost:
As a young man he was engaged in the Steam Boat trade between Cincinnati and New Orleans.
In 1870 he embarked in the Commission business on lower Vine Street, and from that time until a few years ago, when advancing years forced his retirement from active business, occupied a prominent place in the business circles of Cincinnati. He was honored by his business associates by being elected a Director of the Chamber of Commerce, and served creditably in that capacity, as well as on many important Committees.
His last business connection was Manager of the Chamber of Commerce Insurance Company, in which capacity he came closely in touch with many of its members. Among all he was held in the highest esteem. He always had a warm spot in his heart for the younger men, and nothing delighted him so much as to be able to assist and encourage them. His genial ways and his readiness to speak a word of praise or encouragement and his genuine interest in their success, earned for him among these men the title of “Uncle Dick,” indicating so plainly the pleasant relations and loving esteem in which he was generally held.
In April 1857, he was united in marriage to Sarah Arnett. Ten children were born of this union, of whom six survive.
To his family he was always kind and indulgent, and his chiefest concern was for their welfare.
Having been so active in the days of his strength, it was hard for him to give up to the demands of advancing years. His heart was saddened as day after day record was made of the death of some beloved friend. His thoughts of these times reverted to days of old and in speaking of these friends he never wanted for words to tell of their merits.
He lived a long and useful life, and the recollection of his virtues overshadow any memory of his faults. He fought the good fight and has gone to his reward.
As I continue through Sarah Eva Howe's scrapbooks, I hope to learn more about these grandparents. I'll add posts with stories and details as I find them.
 Burial Record, Spring Grove Cemetery, accessed 23 Aug 2016 at http://www.springgrove.org/stats/79526.tif.pdf. Also Ancestry.com, Ohio, Deaths, 1809-1932, 1938-2007, accessed 23 Aug 2016 at http://interactive.ancestry.com/5763/ohvr_d_1908_1-1633/6137550?backurl=http://person.ancestry.com/tree/18397857/person/1617330267/facts/citation/4891874272/edit/record.
 "Ohio Marriages, 1800-1958," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XD86-K8M : 8 December 2014), R. H. Cost and Sarah E. Arnot, 23 Apr 1857; citing Hamilton, Oh, reference 2:3QMH9VK; FHL microfilm 344,471.
 Burial Record, Spring Grove Cemetery, accessed 23 August 2016 at www.springgrove.org/stats/88974.tif.pdf.
 "Ohio Deaths, 1908-1953," database with images, FamilySearch (https://familysearch.org/pal:/MM9.3.1/TH-1951-21323-16298-13?cc=1307272 : 21 May 2014), 1917 > 37121-40150 > image 3065 of 3302.