You do not say what date of 1891 represents, but am assuming it is birth year.Only Lura Elliott on SSDI b in 1891 had final benefit paid in FL, and she received her SS card in FL.There is a Lee Elliott of FL, too.But, they are common names.
Did find the following on TX Dth Idx Online, and SSDI:
John Cobb Pickering b 28 Apr 1893, d 6-21-1964 in Kaufman Co, TX and SS card issued in TX
Fred Elmer Pickering b 19 Apr 1884, d 5-9-1968 in Tarrant Co, TX, last residence in Ft. Worth, Tarrant Co, TX, and SS card issued in PA.
Not as sure of match on the Fred.I would try Kaufman and Van Zandt Co, TX GenWeb sites, some GenWeb counties are putting their cemeteries online.Post a query, see if anyone recognizes your family.If you have any other dates, it would help, especially if you give which event goes along with the date.