Have a look at Canon Hinton Bird's book on Manx education - 'The Island that led' - think he has something on this gentleman

he must have been a bird watcher as in 1885 gave a paper to Antiquarians:
a paper by Mr. C. O. Wickert on "The International Ornithological Congress" held at Vienna, April 1884

in 1889 directory appears as
Professor of Languages.
Wickert Charles Otto, 15 Windsor terrace Ramsey

was on Island in 1863 as Thwaites directory has:
The Grammar School, which was founded by Mr. Charles Cowle, is at present held in the old National School, which was erected by subscription, aided by grants from the British Parliament, in 1831. A new school is expected to be erected and completed during the present year. The school will be built on land situated between Waterloo Road and College Street, and will have entrances from both thoroughfares. The cost of erection will be defrayed by voluntary contributions and the proceeds of a very successful bazaar, which was held in Ballure Glen, in 1859, and which, when all expenses were paid, realized a nett profit of £500. When the new premises are ready, the school now so ably and successfully conducted, will be removed there. The affairs of the school will be managed by seven trustees, (of proper qualifications,) to be elected every five years by the householders occupying houses of the annual rent of £15 and upwards. Three of the trustees (the Bishop of the diocese, the incumbent of St. Paul’s, Ramsey, and the High Bailiff of Ramsey) will be ex officio. The other trustees for the ensuing five years, are Captain George Hall, and Messrs. James Corlett, John James Corkhill, and Willhiam J. Monk. The school is at present conducted by the Rev. William Charles Sparrow, M.A., head master; M. Otto Wickert, classical and German master; M. Charles Joseph Gaudemard, French master; Mr. Thomas Whewell, English master; Mr. J. Barber, music master; Mr. Charles A. K. Kidd, drawing master; and Sergeant Stapleton, drill master.

must also have had an interest in archaelogy as Kermode reports:
"...sites of two large mounds, one known as Cronk-y-Vowlan, and the other nameless. These, as I am informed by Mr. Wickert, who was present, were excavated in September,1866, by Dr. Sydney, Dr. Craine, and others"