Here is the index for volume 4 of HCP.
Ch. 167 - Refugee Column
Ch. 168 - BridgeFinder3
Ch. 169 - Galatheel’s Frustration
Ch. 170 - Call Center
Ch. 171 - You Owe Us Dinner
Ch. 172 - Dogs of War
Ch. 173 - The Five Bidders
Ch. 174 - Earthquake & Bombardment?!
Ch. 175 - Bright Blue
Ch. 176 - Maudib
Ch. 177 - Hurrying Things Along
Ch. 178 - Calling Grandma
Ch. 179 - Lights Out
Ch. 180 - Soul Searching
Ch. 181 - BlueFire
Ch. 182 - Yeti Yak
Ch. 183 - Rhapsody
Ch. 184 - Battle of Wooly Wits
Ch. 185 - Blue Orchid
Ch. 186 - And the Winner Is…
Ch. 187 - Shopping Spree
Ch. 188 - Gourmand
Ch. 189 - Addendum
Ch. 190 - The City Riders
Ch. 191 - Freedom
Ch. 192 - Spy Report
Ch. 193 - Getting In
Ch. 194 - Purl Stitch
Ch. 195 - Time Sand
Ch. 196 - Forage
Ch. 197 - Summon
Ch. 198 - Ticket Boy
Ch. 199 - Energy Crisis
Ch. 200 - Energy Pool
Ch. 201 - Abyssal Bolt
Ch. 202 - Infiltration
Ch. 203 - Barrier
Ch. 204 - Searing Heat
Ch. 205 - How To Keep Yourself Distracted
Ch. 206 - Rusty Mist
Ch. 207 - Rib Stitch
Ch. 208 - Assembly Line
Ch. 209 - Gecko Feet
Ch. 210 - Lin’s Adventure
Ch. 211 - Back to Reality
Ch. 212 - Tipping Point
Ch. 213 - “Thanks, boss!”
Ch. 214 - Targeted
Ch. 215 - Fishbones
Ch. 216 - Tail
Ch. 217 - Grooming
Ch. 218 - Blessings
Ch. 219 - Stealing for Dummies
Ch. 220 - Trapping Light
Ch. 221 - New Beginnings