Study Bagor, Kalibangan, Ahar, Gilund, Ganeshwar and Bairat through context, signature features, significance and the main evidential limit. Ahar and Gilund are a paired study stop. Use the comparison matrix and approximate chronology aid, work through the Ahar–Gilund model, then try recall, phase and evidence checks and a fresh Bagor–Ganeshwar answer. The separate review contains three questions: two for 5 marks within 50 words each and one for 10 marks within 150 words, totalling 20 marks. Suggested practice time is 25 minutes, followed by self-assessment; this is a teaching suggestion, not an official duration or enforced timer. Both language versions of the review questions precede the review models and rubrics. Brief planning lines are included; write full answers separately. This companion contains the new comparison lesson and review only. Read the retained archaeology-method lesson and its separately available shared history PDF first. The free original material supports a selected early-culture and ancient-site strand of the RPSC 9 January 2026 history syllabus. It is not an official paper or complete Rajasthan history coverage. No automatic or staff grading is promised. Source reports are linked, not reproduced.