Mary Hollis Billing

According to Readers Guide to The Mahatma Letters to A. P. Sinnett:

Billing or Billings, Mrs. M. Hollis, a prominent American medium. Mrs. Billing was active in the formation of the London Lodge but did not join it, preferring to retain her membership in the Parent Society. At that time (1877), if a member of the Parent Society joined a branch, membership in the former was forfeited (SH, p. 103). When HSO composed his first circular explaining the origin and plan of the TS and the aims for which it stood Mrs. Billing took a packet of these circulars to London (SH, pp. 104-5). When the Founders went to England in 1879 enroute to India they stayed with Dr. and Mrs. Billing for a time (SH, p. 123). At an election of officers in London Lodge on January 5, 1879, Dr. Billing was elected one of the two vice-presidents (SH, p. 124). Of Dr. Billing, ML-54 (92), pp. 301-2, has some rather severe things to say.