In upper link, there are 14 volumes of newsletter THE THEOSOPHIST; in one place all numbers from 1879 ti 1893 are avaiable.
10 volumes of newsletter LUCIFER are avaiable (from 1887 to 1892).
Numbers for THE PATH (1886 – 1896), 10 volumes.
On upper link, excerpts can be found about feast Vesak from book MOJSTRI IN POT, pages 261-276 (translated by Franček Dobovišek).