Not sure Where the above information comes from but the pocahontas heart would most likely come from Herod and not Elipse. With an outside chance of it being the Diomed heart. In tracing her pedigree in these pages there is no possible way she could carry the heart of Elipse. http://www.tbheritage.com/Portraits/Pocahontas.html
Died in 1870. Pocahontas was bred by King William IV at Hampton Court. She was sold to Mr. Greatrex for 62 guineas at the dispersal of that Royal Stud in in 1837. Commonly considered to be unsuccessful on the racecourse, a closer look at her turf career shows the quality of the fields she raced against. She ran only once as two-year old, managing a third to the highly regarded and unbeaten Crucifix in the Criterion Stakes, showing such promise that she was made third favorite for the Oaks Stakes. Unraced the following year prior to the Oaks, she finished a respectable fourth, again to the brilliant Crucifix, and close behind the placed fillies. In the Goodwood Cup of the same year she was in the lead at the close of the first mile before being overtaken by Beggarman, Lanercost, Hetman Platoff and Charles 12th, beaten only the combined distance of a length and a neck, the rest of the field left far behind. Having already won the Cambridgeshire over Hetman Platoff, and placed third in the St. Leger, Lanercost would win the Ascot Gold Cup in 1841; Hetman Platoff had won the Northumberland Plate and five other races; and Charles 12th had won the St. Leger. Pocahontas did not start again until the Goodwood Cup of the following year when, as a four-year old, she finished unplaced behind the winner Charles 12th. Following the Goodwood Cup she was sold to Mr. Theobald who sent her out in the Cesarewitch, where she finished unplaced behind Illiona, to whom she was giving 15 pounds. Mr. Theobald raced her three more times in 1842 and she finished second in each race. She was then retired to the Stockwell Stud of her owner. Her first four foals did nothing on the racecourse, winning but one race between them. Her fifth foal was Stockwell, who was purchased as a yearling by the Marquis of Exeter. In 1851 after the death of Mr. Theobald, Pocahontas was sold for 260 guineas to Captain Thelluson; the following year he sold her on to the Marquis of Exeter. Although she stood only 14.3 hands and was a roarer, her legacy to the thoroughbred stud book is inestimable. In the stud she produced Stockwell (ch.c. 1849) who won the St. Leger Stakes and 2000 Guineas Stakes, and went on to become known as \\The Emperor of Stallions.\\ He was Champion Sire seven times and 2nd four times. Her other foals included: (1) Rataplan (ch.c. 1850), who won the Doncaster Cup and Ascot Gold Vase, with a reputation as a very tough stayer and later became a Champion broodmare sire; (2) King Tom (b.c. 1851) a Derby 2nd, a good stayer, and a Champion Sire twice; (3) Knight of Kars (b.c. 1855) who is prominent in \\\'chaser pedigrees; (4) Knight of St. Patrick (b.c. 1858); (5) Indiana (br.f. 1848); (6) Ayacanora (ch.f. 1854); (7) Heroine of Lucknow (b.f. 1856); (8) Dolly Varden (won a sweepstakes); (9) Cambaules; (10) Strood; (11) Automation; (12) Auricula (br.f. 1861); and (13) the good mare Araucaria (b.f. 1862) at twenty-five years of age. Said to be the longest lived broodmare in history, Pocahontas died at Burghley Park, Stamford, still the property of Lord Exeter, in 1870 at the age of thirty-three. The photograph was taken of her at age thirty.