I found this reference to Harriet Elizabeth Heale on page 62 of "List of Inscriptions on Tombstones and Monuments in Ceylon by J Penry Lewis, CMG. Hope it will shed some light on your search.
Cherise Pereira, Sri Lanka
Date: May 31, 1855
Name: Harriet Elizabeth Heale
Inscription: "HARRIET ELIZABETH, the beloved wife of ARTHUR WELLINGTON HEALE. Aged 32 years."
A W Heale was in 1846 connected with the firm Hudson, Chandler and Co. He married at the Cathedral, Madras, Harriet Elizabeth, eldest daughter of George Helmore Esq. of Arlington Street, Piccadily, May 20 1846.
Charles Urquhart Stuart married a Miss Helmore, sister of Rev. Mr. Helmore, L.M.S., probably sister of Mrs. Heale.
The Rev. Thomas Helmore, of musical fame, was I think, another relative.
A W Heale died at Blackheath, August 20, 1860.