toll_desc = "to enter a ziggurat",

    local toll_desc
    if self.props.toll_desc then
        toll_desc = self.props.toll_desc
    else
        toll_desc = "at " .. crawl.article_a(self.props.desc)
    end
    crawl.take_note("You paid a toll of " .. needed .. " gold " ..
                    toll_desc .. ".")

end

end

#include "notes.h"

}
static int crawl_take_note(lua_State *ls)
{
    const char* msg = luaL_checkstring(ls, 1);
    take_note(Note(NOTE_MESSAGE, 0, 0, msg));
    return (0);

static int crawl_article_a(lua_State *ls)
{
    const char *s = luaL_checkstring(ls, 1);

    bool lowercase = true;
    if (lua_isboolean(ls, 2))
        lowercase = lua_toboolean(ls, 2);
    lua_pushstring(ls, article_a(s, lowercase).c_str());
    return (1);
}

    { "take_note",      crawl_take_note },

    { "article_a",      crawl_article_a },