found:RLIN, 27 Mar. 2007(hdg: Hayyim Haikel ben Samuel, of Indura, d. 1787)
found:His Sefer Ḥen ṿa-ḥesed ha-mefoʼar, 2018:title page (Morenu Ḥayim Ḥaiḳa z. l.h.h. me-Amdur = חיים חייקא זלה''ה מאמדורא)
found:Encyclopedia Judaica online, viewed November 27, 2018(heading: Ḥayyim Ḥaykl ben Samuel, of Amdur; died in 1787; Hasidic leader in Lithuania; at first hazan in Karlin and then a teacher in Amdur (Indura); was attracted to Hasidism by T. Aaron of Karlin and set up a Hasidic center in Amdur)