Were these inventions principally intended for an improved scheme of kindergarten?

Yes, rendering obsolete popguns, elastic airbladders, games of hazard, catapults.  They comprised astronomical kaleidoscopes exhibiting the twelve constellations of the zodiac from Aries to Pisces, miniature mechanical orreries, arithmetical gelatine lozenges, geometrical to correspond with zoological biscuits, globemap playing balls, historically costumed dolls.

What also stimulated him in his cogitations?

The financial success achieved by Ephraim Marks and Charles A. James, the former by his 1d bazaar at 42 George’s street, south, the latter at his 6-1/2d shop and world’s fancy fair and waxwork exhibition at 30 Henry street, admission 2d, children 1d:  and the infinite possibilities hitherto unexploited of the modern art of advertisement if condensed in triliteral monoideal symbols, vertically of maximum visibility (divined), horizontally of maximum legibility (deciphered) and of magnetising efficacy to arrest involuntary attention, to interest, to convince, to decide.

Such as?

K. II.  Kino’s 11/- Trousers.  House of Keys.  Alexander J. Keyes.

Such as not?

Look at this long candle.  Calculate when it burns out and you receive gratis 1 pair of our special non-compo boots, guaranteed 1 candle power.  Address:  Barclay and Cook, 18 Talbot street.

Bacilikil (Insect Powder).  Veribest (Boot Blacking).  Uwantit (Combined pocket twoblade penknife with corkscrew, nailfile and pipecleaner).

Such as never?

What is home without Plumtree’s Potted Meat?

Incomplete.

With it an abode of bliss.

Manufactured by George Plumtree, 23 Merchants’ quay, Dublin, put up in 4 oz pots, and inserted by Councillor Joseph P. Nannetti, M. P., Rotunda Ward, 19 Hardwicke street, under the obituary notices and anniversaries of deceases.  The name on the label is Plumtree.  A plumtree in a meatpot, registered trade mark.  Beware of imitations.  Peatmot.  Trumplee.  Moutpat.  Plamtroo.

Which example did he adduce to induce Stephen to deduce that originality, though producing its own reward, does not invariably conduce to success?

His own ideated and rejected project of an illuminated showcart, drawn by a beast of burden, in which two smartly dressed girls were to be seated engaged in writing.

What suggested scene was then constructed by Stephen?

Solitary hotel in mountain pass.  Autumn.  Twilight.  Fire lit.  In dark corner young man seated.  Young woman enters.  Restless.  Solitary.  She sits.  She goes to window.  She stands.  She sits.  Twilight.  She thinks.  On solitary hotel paper she writes.  She thinks.  She writes.  She sighs.  Wheels and hoofs.  She hurries out.  He comes from his dark corner.  He seizes solitary paper.  He holds it towards fire.  Twilight.  He reads.  Solitary.