diff --git a/400_xowa/src/gplx/xowa/htmls/portal/Xoh_subpages_bldr.java b/400_xowa/src/gplx/xowa/htmls/portal/Xoh_subpages_bldr.java
index b3fe649e2..fb740d1df 100644
--- a/400_xowa/src/gplx/xowa/htmls/portal/Xoh_subpages_bldr.java
+++ b/400_xowa/src/gplx/xowa/htmls/portal/Xoh_subpages_bldr.java
@@ -17,6 +17,8 @@ package gplx.xowa.htmls.portal; import gplx.*; import gplx.xowa.*; import gplx.x
 import gplx.core.brys.fmtrs.*;
 import gplx.xowa.htmls.hrefs.*;
 import gplx.xowa.wikis.nss.*;
+import gplx.langs.htmls.encoders.*;
+import gplx.xowa.htmls.core.htmls.*;
 public class Xoh_subpages_bldr implements gplx.core.brys.Bfr_arg {
 	private final    Bry_bfr html_bfr = Bry_bfr_.Reset(255), path_bfr = Bry_bfr_.Reset(255), subpage_caption_bfr = Bry_bfr_.Reset(255);
 	private Xowe_wiki wiki;
@@ -77,11 +79,14 @@ public class Xoh_subpages_bldr implements gplx.core.brys.Bfr_arg {
 				: subpage_caption_bfr.To_bry(); // nth seg is caption_bfr ("b", not "Help:A/b")
 			subpage_caption_bfr.Clear(); // always clear subpage_caption_bfr; note that 1st seg will add to bfr, but never use it
 
+			// escape " as " PAGE:en.s:A_Critical_Examination_of_Dr_G._Birkbeck_Hills_"Johnsonian"_Editions/The_Preface_and_Dedication; ISSUE#:627; DATE:2020-03-10
+			byte[] subpage_ttl_escaped = Xoh_html_wtr_escaper.Escape(wiki.Appe().Parser_amp_mgr(), subpage_caption_bfr, subpage_ttl_bry);
+
 			// add to subpage trail
 			// NOTE: convert underscore to space; ISSUE#:308 PAGE:en.v:Computer-aided_design/Software DATE:2018-12-23
 			fmtr_itm.Bld_bfr(bfr, delimiter
 				, Bry_.Add(Xoh_href_.Bry__wiki, subpage_ttl.Full_url()) // EX: /wiki/Help:A
-				, Xoa_ttl.Replace_unders(subpage_ttl_bry)
+				, Xoa_ttl.Replace_unders(subpage_ttl_escaped)
 				, Xoa_ttl.Replace_unders(subpage_caption));
 		}
 		path_bfr.Clear();
diff --git a/400_xowa/src/gplx/xowa/htmls/portal/Xoh_subpages_bldr_tst.java b/400_xowa/src/gplx/xowa/htmls/portal/Xoh_subpages_bldr_tst.java
index 415158f6f..1f601ac80 100644
--- a/400_xowa/src/gplx/xowa/htmls/portal/Xoh_subpages_bldr_tst.java
+++ b/400_xowa/src/gplx/xowa/htmls/portal/Xoh_subpages_bldr_tst.java
@@ -32,6 +32,13 @@ public class Xoh_subpages_bldr_tst {
 		, "</span>"
 		));
 	}
+	@Test  public void Underscore_quote() { // PURPOSE: escape " as &quot; PAGE:en.s:A_Critical_Examination_of_Dr_G._Birkbeck_Hills_"Johnsonian"_Editions/The_Preface_and_Dedication; ISSUE#:627; DATE:2020-03-10
+		fxt.Init__Create_pages("Help:A", "Help:A/\"B\"");
+		fxt.Test__Parse("Help:A/\"B\"/C", String_.Concat_lines_nl_skip_last
+		( "<span class=\"subpages\">&lt; <a href=\"/wiki/Help:A\" title=\"Help:A\">Help:A</a>&lrm; | <a href=\"/wiki/Help:A/%22B%22\" title=\"Help:A/&quot;B&quot;\">\"B\"</a>"
+		, "</span>"
+		));
+	}
 	@Test  public void Skip_page_ns() {
 		fxt.Init__Page_ns();
 		fxt.Test__Parse("Page:A/B/C", "");