text: He was involved in litigation in 1889 with his former assistant Charles A. Borst , and the `` Great Star-Catalog Case '' Peters v. Borst went before the Supreme Court of New York .
simplified: He was involved in litigation in 1889 with his old assistant Charles A. Borst , and the `` Great Star-Catalog Case '' Peters v. Borst went before the Supreme Court of New York .