Make custard of first four ingredients, strain, cool; add cream, pineapple syrup, and chestnuts; then freeze. To prepare chestnuts, shell, cook in boiling water until soft, and force through a strainer. Line a two-quart melon mould with part of mixture; to remainder add one-half cup candied fruit cut in small pieces, one-quarter cap sultana raisins, and eight chestnuts broken in pieces, first soaked several hours in Maraschino syrup. Fill mould, cover, pack in salt and ice, and let stand two hours. Serve with whipped cream, sweetened and flavored with Maraschino syrup.